Puzzles - GeeksforGeeks

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target="_self">Beginner's DSA Sheet</a></li><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a href="https://www.geeksforgeeks.org/explore?page=1&sprint=50746f92a895c22a50504ac0c1fb9c84&sortBy=submissions&sprint_name=Top 50 Array Problems&itm_source=geeksforgeeks&itm_medium=main_header_outIndia&itm_campaign=DSA_Header" target="_self">Top 50 Array Problems</a></li><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a href="https://www.geeksforgeeks.org/explore?page=1&sprint=57184072610b884e5df3584cc534115d&sortBy=submissions&sprint_name=Top 50 String Problems&itm_source=geeksforgeeks&itm_medium=main_header_outIndia&itm_campaign=DSA_Header" target="_self">Top 50 String Problems</a></li><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a 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Problems</a></li></ul></li></ul></li><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a href="https://www.geeksforgeeks.org/competitive-programming-a-complete-guide/?ref=outind" target="_self">Competitive Programming</a></li><li class="mega-dropdown__list-item" data-parent="false" aria-expanded="true" data-expandable="true"><span>Company Wise SDE Sheets</span><i class="gfg-icon gfg-icon_arrow-right"></i><ul class="mega-dropdown Screen_2"><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a href="https://www.geeksforgeeks.org/facebookmeta-sde-sheet-interview-questions-and-answers/?ref=outind" target="_self">Facebook SDE Sheet</a></li><li class="mega-dropdown__list-item" data-child="true" aria-expanded="false" data-expandable="false"><a href="https://www.geeksforgeeks.org/amazon-sde-sheet-interview-questions-and-answers/?ref=outind" target="_self">Amazon SDE Sheet</a></li><li 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class="gfg-share-icon"></i> <span>Share</span> </div> </div> </div> <div class="article--viewer_report tooltip"> <div class="three_dot_dropdown_div three_dot_dropdown_reportarticle"> <div class="three_dot_dropdown_inner_div" data-gfg-action="report-article" onclick="report_article();"> <i class="gfg-icon gfg-icon_report"></i> <span>Report</span> </div> </div>  </div> <div class="article--viewer_Gnews tooltip"> <a class="three_dot_dropdown_inner_div Gnews_wrapper" href ='https://news.google.com/publications/CAAqBwgKMLTrzwsw44bnAw?hl=en-IN&gl=IN&ceid=IN%3Aen' target="_blank"> <img class="gfg-icon_Gnews no-zoom-in-cursor" src=https://media.geeksforgeeks.org/auth-dashboard-uploads/Google-news.svg loading="lazy" alt="News"></img> <span class='kebab_menu_news_text'>Follow</span> </a> </div> </div> </div> <div class="text"> <p dir="ltr"><span>Puzzles are commonly asked in exams and interviews to test logical and analytical thinking. Here is a list of most asked Puzzles divided into four categories as per examination pattern. </span></p><h3 id="analytical-mathematical-puzzles"><b><strong>1. Analytical / Mathematical Puzzles</strong></b></h3><table><thead><tr><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><span>Puzzle Title</span></p></th><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><span>Asked in Company</span></p></th></tr></thead><tbody><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-2-find-ages-of-daughters/" rel="noopener"><span>Find ages of daughters</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-3-calculate-total-distance-travelled-by-bee/" rel="noopener"><span>Calculate total distance traveled by bee</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-6x6-grid-how-many-ways/" rel="noopener"><span>6×6 Grid - Ways to Reach Bottom Right</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/amazon-inc/" target="_blank" rel="noopener"><span>Amazon</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/zoho-corporation/" rel="noopener"><span>Zoho</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-6-monty-hall-problem/" rel="noopener"><span>Monty Hall problem</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/vmware/" rel="noopener"><span>VMWare</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-18-torch-and-bridge/" rel="noopener"><span>Torch and Bridge</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-set-35-2-eggs-and-100-floors/" rel="noopener"><span>2 Eggs and 100 Floors</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/vmware/" rel="noopener"><span>VMWare</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-12-maximize-probability-of-white-ball/" rel="noopener"><span>Maximize the probability of White Ball</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/amazon-inc/" target="_blank" rel="noopener"><span>Amazon</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-19-poison-and-rat/" rel="noopener"><span>Poison and Rat</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/amazon-inc/" target="_blank" rel="noopener"><span>Amazon</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-27-hourglasses-puzzle/" rel="noopener"><span>Hourglasses Puzzle</span></a></td><td style="width: 233.333px;"><span>Bank of America, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-17-ratio-of-boys-and-girls-in-a-country-where-people-want-only-boys/" rel="noopener"><span>The ratio of Boys and Girls in a Country where people want only boys</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/goldman-sachs/" rel="noopener"><span>Goldman Sachs</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-29-car-wheel-puzzle/" rel="noopener"><span>Car Wheel Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/makemytrip/" rel="noopener"><span>MakeMytrip</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-22-maximum-chocolates/" rel="noopener"><span>Maximum Chocolates</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/infosys/" rel="noopener"><span>Infosys</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/makemytrip/" rel="noopener"><span>MakeMytrip</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-splitting-a-cake-with-a-missing-piece-in-two-equal-portion/" rel="noopener"><span>Puzzle | Splitting a Cake with a Missing Piece in two equal portion</span></a></td><td style="width: 233.333px;"><span>Alcatel-Lucent, </span><a href="https://www.geeksforgeeks.org/companies/cognizant/" rel="noopener"><span>Cognizant</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-33-rs-500-note-puzzle/" rel="noopener"><span>Rs 500 Note Puzzle</span></a></td><td style="width: 233.333px;"><span>CAT, </span><a href="https://www.geeksforgeeks.org/category/upsc/" rel="noopener"><span>UPSC</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-44-girl-or-boy/" rel="noopener"><span>Girl or Boy</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/amazon-inc/" target="_blank" rel="noopener"><span>Amazon</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-26-know-average-salary-without-disclosing-individual-salaries/" rel="noopener"><span>Know Average Salary without Disclosing Individual Salaries</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/infosys/" rel="noopener"><span>Infosys</span></a><span>, Bloomberg.</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-37-maximum-run-in-cricket/" rel="noopener"><span>Maximum run in cricket</span></a></td><td style="width: 233.333px;"><span>FAANG</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-32-completion-of-task/" rel="noopener"><span>Completion of Task</span></a></td><td style="width: 233.333px;"><span>Reflexis Systems</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-40-find-missing-row-in-excel/" rel="noopener"><span>Find missing Row in Excel</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/philips/" rel="noopener"><span>philips</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/four-people-rickety-bridge/" rel="noopener"><span>Four People on a Rickety Bridge</span></a></td><td style="width: 233.333px;"><span>Jumbotail, </span><a href="https://www.geeksforgeeks.org/companies/sap/" rel="noopener"><span>SAP</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-man-fell-in-well-puzzle/" rel="noopener"><span>Man fell in well Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/american-express/" rel="noopener"><span>American Express</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-50-red-marbles-and-50-blue-marbles/" rel="noopener"><span>50 red marbles and 50 blue marbles</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, J</span><a href="https://www.geeksforgeeks.org/companies/jpmorgan-chase--co/" rel="noopener"><span>P morgan chase</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-form-three-equilateral-triangles/" rel="noopener"><span>Puzzle | Form Three Equilateral Triangles</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-10-identical-bottles-pills/" rel="noopener"><span>10 identical bottles of pills</span></a></td><td style="width: 233.333px;"><span>ZS Associate</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-maximum-pieces-that-can-be-cut-from-a-circle-using-6-straight-lines/" rel="noopener"><span>Puzzle | Maximum pieces that can be cut from a Circle using 6 straight lines</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-85-chain-link-puzzle/" rel="noopener"><span>Chain Link Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/cognizant/" rel="noopener"><span>cognizant</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/interview-puzzle-the-shopkeeper-and-the-lady-who-made-a-purchase-of-rs-200-with-fake-note/" rel="noopener"><span>The shopkeeper and the lady who made a purchase of Rs 200 with fake note</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/persistent-systems/" rel="noopener"><span>Persistent Systems</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/egg-dropping-puzzle-with-2-eggs-and-k-floors/" rel="noopener"><span>Egg Dropping Puzzle with 2 Eggs and K Floors</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/minimum-number-of-apples-to-be-collected-from-trees-to-guarantee-m-red-apples/" rel="noopener"><span>Minimum number of Apples to be collected from trees to guarantee M red apples</span></a></td><td style="width: 233.333px;"><span>Leetcode</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-snail-and-wall/" rel="noopener"><span>Snail and Wall</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-1000-light-bulbs-switched-on-off-by-1000-persons-passing-by/" rel="noopener"><span>1000 light bulbs switched on/off by 1000 people passing by</span></a></td><td style="width: 233.333px;"><span>UK university interview</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-four-alternating-knights/" rel="noopener"><span>Puzzle | Four Alternating Knights</span></a></td><td style="width: 233.333px;"><span>Amazon, </span><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/tcs-digital-puzzle-lateral-thinking-2/" rel="noopener"><span>TCS DIGITAL PUZZLE | Lateral Thinking 2</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-100-cows-and-milk/" rel="noopener"><span>Puzzle | 100 Cows And Milk</span></a></td><td style="width: 233.333px;"><span>ZS</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-one-mile-on-the-globe-mcq/" rel="noopener"><span>Puzzle | One Mile on the Globe</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/tcs-digital-puzzle-lateral-thinking/" rel="noopener"><span>TCS DIGITAL PUZZLE | Lateral Thinking</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-counters-and-board/" rel="noopener"><span>Puzzle | The Counters and Board</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/jpmorgan-chase--co/" rel="noopener"><span>JP-morgan</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-15-camel-and-banana-puzzle/" rel="noopener"><span>Camel and Banana Puzzle</span></a></td><td style="width: 233.333px;"><span>Amazon, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-six-matches-right-foot-forward/" rel="noopener"><span>Puzzle | (Six Matches , Right Foot Forward)</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-how-much-he-had-initially/" rel="noopener"><span>How much he had initially?</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/tag/ias/" rel="noopener"><span>IAS interview question</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-3-cuts-cut-round-cake-8-equal-pieces/" rel="noopener"><span>Puzzle | 3 cuts to cut round cake into 8 equal pieces</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/adobe-systems/" rel="noopener"><span>Adobe</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/citiustech-healthcare-technology-private-ltd/" rel="noopener"><span>Citius Tech</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/cognizant/" rel="noopener"><span>Cognizant</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/blackrock/" rel="noopener"><span>blackrock</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-two-creepers-climbing-a-tree/" rel="noopener"><span>Two Creepers Climbing a Tree</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/adobe-systems/" rel="noopener"><span>Adobe</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr></tbody></table><p dir="ltr"><b><strong>Read More: </strong></b><a href="https://www.geeksforgeeks.org/tag/analytical-mathematical-puzzles/" rel="noopener"><span>Articles on Analytical/mathematical puzzles</span></a></p><h3 id="logical-puzzles"><b><strong>2. Logical Puzzles </strong></b></h3><table><thead><tr><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><b><strong>Puzzle Title</strong></b></p></th><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><b><strong>Asked in Company</strong></b></p></th></tr></thead><tbody><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-4-pay-an-employee-using-a-gold-rod-of-7-units/" rel="noopener"><span>Pay an employee using a gold rod of 7 units ?</span></a></td><td style="width: 233.333px;"><span>FAANG, Ola cabs</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-9-find-the-fastest-3-horses/" rel="noopener"><span>Find the fastest 3 horses</span></a></td><td style="width: 233.333px;"><span>Accolite, </span><a href="https://www.geeksforgeeks.org/companies/goldman-sachs/" rel="noopener"><span>Goldman Sachs</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/makemytrip/" rel="noopener"><span>MakeMyTrip</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-5-finding-the-injection-for-anesthesia/" rel="noopener"><span>Finding the injection for Anesthesia</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-7-3-bulbs-and-3-switches/" rel="noopener"><span>3 Bulbs and 3 Switches</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/makemytrip/" rel="noopener"><span>MakeMyTrip</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/qualcomm/" rel="noopener"><span>Qualcomm</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-15-camel-and-banana-puzzle/" rel="noopener"><span>Camel and Banana Puzzle</span></a></td><td style="width: 233.333px;"><span>Amazon, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-7-find-the-jar-with-contaminated-pills/" rel="noopener"><span>Find the Jar with contaminated pills</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/makemytrip/" rel="noopener"><span>MakeMyTrip</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-13-100-prisoners-with-redblack-hats/" rel="noopener"><span>100 Prisoners with Red/Black Hats</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-24-10-coins-puzzle/" rel="noopener"><span>10 Coins Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-14-strategy-for-a-2-player-coin-game/" rel="noopener"><span>Strategy for a 2-Player Coin Game</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-20-5-pirates-and-100-gold-coins/" rel="noopener"><span>5 Pirates and 100 Gold Coins</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-31-minimum-cut-puzzle/" rel="noopener"><span>Minimum cut Puzzle</span></a></td><td style="width: 233.333px;"><span>Amazon</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-34-prisoner-and-policeman-puzzle/" rel="noopener"><span>Prisoner and Policeman Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-cheating-husband/" rel="noopener"><span>Puzzle - Cheating Husband</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-blind-games/" rel="noopener"><span>Puzzle – Blind Games</span></a></td><td style="width: 233.333px;"><span>Bloomberg L.P.</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-chameleons-go-on-a-date/" rel="noopener"><span>Puzzle – Chameleons go on a date</span></a></td><td style="width: 233.333px;"><span>Amazon</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-heaven-hell/" rel="noopener"><span>Heaven and Hell</span></a></td><td style="width: 233.333px;"><span>Amazon, </span><a href="https://www.geeksforgeeks.org/companies/infosys/" rel="noopener"><span>Infosys</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-mislabeled-jars/" rel="noopener"><span>Mislabeled Jars</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-8-balls-problem/" rel="noopener"><span>8 balls problem</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, Simence</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/cheryls-birthday-puzzle-and-solution/" rel="noopener"><span>Cheryl’s Birthday Puzzle and Solution</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/facebook/" rel="noopener"><span>Facebook</span></a><span>, Whatsapp, Singapore math Olympic</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-lion-and-the-unicorn/" rel="noopener"><span>Puzzle – The Lion and the Unicorn</span></a></td><td style="width: 233.333px;"><span>The Access Group (UK), </span><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-farmer-goat-wolf-cabbage/" rel="noopener"><span>Farmer, Goat, Wolf, and Cabbage</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/infosys/" rel="noopener"><span>Infosys</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-water-jug-problem/" rel="noopener"><span>Water Jug Problem</span></a></td><td style="width: 233.333px;"><span>Wells Fargo</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-blind-man-and-pills/" rel="noopener"><span>Blind man and Pills</span></a></td><td style="width: 233.333px;"><span>Mentor Graphics</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-burning-candles/" rel="noopener"><span>The Burning Candles</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/wipro/" rel="noopener"><span>Wipro</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-burning-candles/" rel="noopener"><span>Puzzle | The Burning Candles</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/wipro/" rel="noopener"><span>Wipro</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/ibm/" rel="noopener"><span>IBM</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-rat-and-poisonous-milk-bottles/" rel="noopener"><span>Rat and Poisonous Milk Bottles</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/measuring-6l-water-4l-9l-buckets/" rel="noopener"><span>Measuring 6L water from 4L and 9L buckets</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-six-houses-p-q-r-s-t-and-u/" rel="noopener"><span>Six Houses P, Q, R, S, T, and U</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/category/quizzes-gq/cat-quiz/" rel="noopener"><span>CAT Quiz</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/melting-candles-puzzle/" rel="noopener"><span>Melting Candles</span></a></td><td style="width: 233.333px;"><span>Faang</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-47-red-hat-vs-blue-hat/" rel="noopener"><span>Red Hat vs Blue Hat</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-joint-family-of-seven-persons-l-m-n-o-p-q-and-r/" rel="noopener"><span>Puzzle | Joint family of seven persons (L, M, N, O, P, Q, and R)</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-circle-of-lights/" rel="noopener"><span>Puzzle | The Circle of Lights</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, Bloomberg</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-9-students-and-red-black-hats/" rel="noopener"><span>Puzzle | 9 Students and Red Black Hats</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-light-all-the-bulbs/" rel="noopener"><span>Light all the bulbs</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, Bloomberg</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-distribute-the-water/" rel="noopener"><span>Distribute the Water</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-can-2-persons-be-with-same-number-of-hairs-on-their-heads/" rel="noopener"><span>Puzzle | Can 2 persons be with same number of hairs on their heads?</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/oppo/" rel="noopener"><span>oppo</span></a><span>, inflame</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/weight-heavy-ball/" rel="noopener"><span>Weight of Heavy Ball</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/ibm/" rel="noopener"><span>IBM</span></a></td></tr></tbody></table><p dir="ltr"><b><strong>Read More:</strong></b><a href="https://www.geeksforgeeks.org/tag/logical-puzzles/" rel="noopener"><span>Articles on Logical Puzzles</span></a></p><h3 id="arrangement-puzzles"><b><strong>3. Arrangement Puzzles</strong></b></h3><table><thead><tr><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><b><strong>Puzzle Title</strong></b></p></th><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><b><strong>Asked in Company</strong></b></p></th></tr></thead><tbody><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-24-10-coins-puzzle/" rel="noopener"><span>10 Coins Puzzle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/yahoo/" rel="noopener"><span>Yahoo</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-23-days-of-month-using-2-dice/" rel="noopener"><span>Days of the month using 2 dice</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-38-tic-tac-toe-puzzle/" rel="noopener"><span>Tic Tac Toe Puzzle</span></a></td><td style="width: 233.333px;"><span>Amazon</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-36-matchstick-puzzle/" rel="noopener"><span>Matchstick Puzzle</span></a></td><td style="width: 233.333px;"><span>Kirloskar Brothers, SLB</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-30-last-palindrome-data/" rel="noopener"><span>Last Palindrome Date Before 10/02/2001</span></a></td><td style="width: 233.333px;"><span>Amazon</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-10-identical-bottles-pills/" rel="noopener"><span>10 identical bottles of pills</span></a></td><td style="width: 233.333px;"><span>ZS Associate</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-10-balls-in-5-lines/" rel="noopener"><span>10 Balls in 5 Lines</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/publicis-sapient/" rel="noopener"><span>Publicis Sapient</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-round-table-coin-game/" rel="noopener"><span>Round table coin game</span></a></td><td style="width: 233.333px;"><span>ElectrifAi</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-the-circle-of-lights/" rel="noopener"><span>Puzzle | The Circle of Lights</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/microsoft/" rel="noopener"><span>Microsoft</span></a><span>, Bloomberg</span></td></tr></tbody></table><p dir="ltr"><b><strong>Read More: </strong></b><a href="https://www.geeksforgeeks.org/tag/arrangement-puzzles/" rel="noopener"><span>Articles on Arrangement Puzzles</span></a></p><h3 id="shape-based-puzzles"><b><strong>3. Shape based Puzzles</strong></b></h3><table><thead><tr><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><span>Puzzle Title</span></p></th><th style="width: 233.333px;"><p style="text-align: center;" dir="ltr"><span>Asked in Company</span></p></th></tr></thead><tbody><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-3-cuts-cut-round-cake-8-equal-pieces/" rel="noopener"><span>3 cuts to cut the round cake into 8 equal pieces</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/adobe-systems/" rel="noopener"><span>Adobe</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/citiustech-healthcare-technology-private-ltd/" rel="noopener"><span>Citius Tech</span></a><span>, </span><a href="https://www.geeksforgeeks.org/companies/cognizant-technology-solutions/" rel="noopener"><span>Cognizant</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-25chessboard-and-dominos/" rel="noopener"><span>Chessboard and dominos</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/google/" rel="noopener"><span>Google</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-36-matchstick-puzzle/" rel="noopener"><span>Puzzle 36 | (Matchstick Puzzle)</span></a></td><td style="width: 233.333px;"><span>SLB</span></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-maximum-pieces-that-can-be-cut-from-a-circle-using-6-straight-lines/" rel="noopener"><span>Maximum pieces that can be cut from a Circle using 6 straight lines</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/tata-consultancy-service-tcs/" rel="noopener"><span>TCS</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-splitting-a-cake-with-a-missing-piece-in-two-equal-portion/" rel="noopener"><span>Splitting a Cake with a Missing Piece in two equal portion</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/sap/" rel="noopener"><span>SAP</span></a></td></tr><tr><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/puzzle-21-3-ants-and-triangle/" rel="noopener"><span>3 Ants and Triangle</span></a></td><td style="width: 233.333px;"><a href="https://www.geeksforgeeks.org/companies/intuit/" rel="noopener"><span>Intuit</span></a><span>, ZS Associate, </span><a href="https://www.geeksforgeeks.org/companies/exl/" rel="noopener"><span>EXL</span></a></td></tr></tbody></table><p dir="ltr"><b><strong>Read More:</strong></b><span> </span><a href="https://www.geeksforgeeks.org/tag/shape-puzzles/" rel="noopener"><span>Articles on Shape based puzzles</span></a></p><h3 id="mechanical-puzzles"><b><strong>4. Mechanical Puzzles</strong></b></h3><ol><li value="1"><a href="https://www.geeksforgeeks.org/algorithm-to-solve-rubiks-cube/" rel="noopener"><span>Algorithm to solve Rubik’s Cube</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/crossword-puzzle-of-the-week-1-for-dsa/" rel="noopener"><span>Crossword Puzzle Of The Week #1 (for DSA)</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/crossword-puzzle-of-the-week-2-for-computer-science-and-applications/" rel="noopener"><span>Crossword Puzzle Of The Week #2 (for Computer Science and Applications)</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/crossword-puzzle-of-the-week-3-for-database-and-queries/" rel="noopener"><span>Crossword Puzzle Of The Week #3 (for Database and Queries)</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/crossword-puzzle-of-the-week-4-for-object-oriented-programming/" rel="noopener"><span>Crossword Puzzle Of The Week #4 (for Object Oriented Programming)</span></a></li></ol><h3 id="quick-links"><b><strong>Quick Links:</strong></b></h3><ul><li value="1"><a href="https://www.geeksforgeeks.org/logic-building-problems/" target="_blank" rel="noopener"><span>Logic Building Coding Problems</span></a></li><li value="2"><a href="https://practice.geeksforgeeks.org/topics/Puzzle/" rel="noopener"><span>'Practice Problems' on Puzzles</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/category/puzzles/" rel="noopener"><span>Recent Puzzles!</span></a></li></ul>  <div class='article_bottom_text'></div><br> <div id="video-tab-content" class="video-tab-content"> <div style="text-align: center; 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Step 2) Y also adds a Random Number and his salary to the sum told by X and tells new</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-37-maximum-run-in-cricket/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 37 | (Maximum run in cricket) </div> <div class="gfg-similar-read-item-subheading">Question: In a one day international cricket match, considering no extras(no wides, no 'no' balls, etc.) and no overthrows. What is the maximum number of runs that a batsman can score in an ideal case ? Note:"Here we assume ideal and little practical scenario. We assume that batsman can not run for</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-32-completion-of-task/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 32| (Completion of Task) </div> <div class="gfg-similar-read-item-subheading">A man is allocated a task. He doubles the task done everyday. If the man completely does the task in 18 days, how many days did it take for the man to complete 25% of the task? Answer: 16 [Tex]w [/Tex] 100% of task = 18 days As he doubles the task everyday. So, 50% of task = 17 days 25% of task = 16</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-40-find-missing-row-in-excel/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 40 | (Find missing Row in Excel) </div> <div class="gfg-similar-read-item-subheading">We are given an excel sheet which contains integers from 1 to 50, including both. However, the numbers are in a jumbled form and there is 1 integer missing. You have to write a code to identify the missing integer. Only the logic is required. Solution: We know that the sum of all the numbers from 1</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/four-people-rickety-bridge/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Four People on a Rickety Bridge </div> <div class="gfg-similar-read-item-subheading">Question: Four people need to cross a rickety bridge at night. Unfortunately, they have one torch and the bridge is too dangerous to cross without a torch. The bridge can support only two people at a time. All the people don't take the same time to cross the bridge. Time for each person: 1 min, 2 mi</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-man-fell-in-well-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Man fell in well Puzzle </div> <div class="gfg-similar-read-item-subheading">A man fell in a 50m deep well. He climbs 4 meters up and slips 3 meters down in one day. How many days would it take for him to come out of the well? Answer: 47days Explanation: On the first day, the man climbs 4 meters up and slips 3 meters down, therefore he only climbs 1 meter up totally.On the s</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-50-red-marbles-and-50-blue-marbles/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 50 red marbles and 50 blue marbles </div> <div class="gfg-similar-read-item-subheading">Give two boxes B1 and B2 one have 50 red marbles and other have 50 blue marbles. A ball is selected randomly from any of the box and the task is to maximize the probability of selecting a red ball, by reshuffling marbles in both the boxes. Solution: Let P(R) be the probability of picking a red marbl</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-bag-of-coins/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Bag of Coins </div> <div class="gfg-similar-read-item-subheading">Puzzle: Ishita has 10 bags full of coins. Each bag contains 1000 coins. But one bag is full of forgeries, and she just can't recall which one. She does know that genuine coins weigh 1 gram, but forgeries weigh 1.1 grams. To hide the fact that she can't recall which bag contains forgeries, she needs</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-find-last-ball-remain-entire-process/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Find the last ball to remain after the entire process </div> <div class="gfg-similar-read-item-subheading">Problem Statement: You have 20 Red and 16 Blue balls in a bag. You pull out 2 balls one after another. If the balls are of the same color, then you replace them with a Blue ball â but if they are of different color, you replace them with a Red ball. Once you take out the balls, you do not put them b</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-10-identical-bottles-pills/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 10 identical bottles of pills </div> <div class="gfg-similar-read-item-subheading">Puzzle: Given 10 identical bottles of identical pills (each bottle contains 100 pills). Out of 10 bottles 9 have 1 gram of pills but 1 bottle has pills of the weight of 1.1 gram. Given a measurement scale, how would you find the heavy bottle? You can use the scale only once.Â  Solution:Â  Step 1: Arra</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/hungry-worm-and-old-tree-riddle-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Hungry Worm and Old Tree Riddle | Puzzle </div> <div class="gfg-similar-read-item-subheading">Problem Statement: A very hungry worm reaches a tree and eats the leaves in the following sequence: DAY 1: The worm eats 1 leafDAY 2: TWICE( DAY 1)= 2 leavesDAY 3: TWICE( DAY 2)= 4 leavesDAY 4: TWICE( DAY 3)= 8 leaves and so on.....(up to 30 days) The above eating sequence continues for 30 days and</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-85-chain-link-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 85 | Chain Link Puzzle </div> <div class="gfg-similar-read-item-subheading">You have five pieces of chain, each consisting of three links. You want to make one long chain of these five pieces. Breaking open a link costs 1 Rs, and welding an open link costs 3 Rs. Is it possible to make one long chain of the five pieces, if you have just 15 Rs? Solution: Let us name the chain</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/interview-puzzle-the-shopkeeper-and-the-lady-who-made-a-purchase-of-rs-200-with-fake-note/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Interview Puzzle | The shopkeeper and the lady who made a purchase of Rs 200 with fake note </div> <div class="gfg-similar-read-item-subheading">Puzzle: A lady makes a purchase of Rs 200/- in a store. The shopkeeper sells the goods with zero profit. He receives a Rs 1000/- note from the lady. The shopkeeper gets the change from the next shop, retains Rs.200 for himself, and gives the lady Rs.800 back. Later, the shopkeeper at the next shop c</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-snail-and-wall/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Snail and Wall </div> <div class="gfg-similar-read-item-subheading">Puzzle: A snail wishes to reach a water shore. To do this it must cross a wall which is 30 feet high. It has a time limit of 30 hours to reach atop the wall. The time starts as soon as it starts climbing the wall. However, he faces a problem while climbing. Every hour it climbs the wall 3 feet up, i</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-45-gem-in-pockets/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 45 | Gem in Pockets </div> <div class="gfg-similar-read-item-subheading">Vijay Dinanath Chauhan aka âVDCâ was travelling from Bangalore to New Delhi along with his friends. VDC was wearing a Cargo Jeans with finite number of small pockets. And in his pockets, there were packets of gems, not the real ones,actually the Cadbury gems to eat when he reaches Delhi.In each pock</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/pizza-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Pizza Puzzle </div> <div class="gfg-similar-read-item-subheading">Problem Statement: At a restaurant, pizzas can be ordered in boxes of 6, 9, and 20. What is the highest number of Pizzas that cannot be bought with any combination of these boxes? For Example: There exist two types of solutions for such a problem.They include mathematical and algorithmic ones.The ma</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-49-king-and-his-elephant-power/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 49 | King and his Elephants </div> <div class="gfg-similar-read-item-subheading">A king dies after writing an agreement to divide the elephant power to his three sons, the first son has to get 1/2 of elephants, second son gets 3/4th of remaining elephants left after giving away to the first son, third son gets 1/2th of remaining elephants left after giving away to the second son</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-find-the-box-which-contains-box-of-11-gm-cigarettes/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Find the box which contains Box of 11 gm Cigarettes </div> <div class="gfg-similar-read-item-subheading">Suppose you have 10 boxes and each box contains 10 Cigarettes. 9 out of 10 boxes have each Cigarette of 10 gm. Remaining 1 box has each Cigarette of 11 gm. The task is to find the box which contains 11gm Cigarettes. Constraint: You have an electronic weighing machine and with the help of that you ha</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-how-much-he-had-initially/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | How much he had initially? </div> <div class="gfg-similar-read-item-subheading">Puzzle: Rama started on a quest of visiting temples, with few coins in his pockets. As soon as he visits any temple, the money in his pocket gets doubled and on his way out, he donates Rs. 100 to each temple. He visits 4 temples on his quest. After visiting the last temple, his pocket is empty of al</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-minimum-planes-to-go-around-the-world/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Minimum planes to go around the world </div> <div class="gfg-similar-read-item-subheading">On an Island, there is an airport that has an unlimited number of identical air-planes. Each air-plane has a fuel capacity to allow it to fly exactly 1/2 way around the world, along a great circle. The planes have the ability to refuel in flight without loss of speed or spillage of fuel. Though the</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-six-colored-cube/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Six colored cube </div> <div class="gfg-similar-read-item-subheading">Given six distinct colors, in how many unique ways can a six faced cube be painted such that no two faces have the same color? Note: Mixing of colors is not allowed. Answer: 30 ways Explanation: To avoid repetitions, let us fix the color of the top face. Hence, the bottom face can be painted in 5 wa</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Logical Puzzles<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-9-find-the-fastest-3-horses/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 9 | (Find the fastest 3 horses) </div> <div class="gfg-similar-read-item-subheading">There are 25 horses among which you need to find out the fastest 3 horses. You can conduct a race among at most 5 to find out their relative speed. At no point, you can find out the actual speed of the horse in a race. Find out the minimum no. of races which are required to get the top 3 horses. Sol</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-5-finding-the-injection-for-anesthesia/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 5 | (Finding the Injection for Anesthesia) </div> <div class="gfg-similar-read-item-subheading">In a Medical Laboratory, you have 240 Injections, one of which is for Anesthesia for a rat. If Anesthesia injection is injected in a rat, it will faint in within 24 hours. You have 5 rats available to determine which one injection contains the Anesthesia. How do you achieve this in 48 hours ? Clarif</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-4-pay-an-employee-using-a-gold-rod-of-7-units/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 4 | (Pay an employee using a gold rod of 7 units ?) </div> <div class="gfg-similar-read-item-subheading">An employee works for an employer for 7 days. The employer has a gold rod of 7 units. How does the employer pay to the employee, so that the number of employeeâs rod units increases by one at the end of each day? The employer can make at most 2 cuts in the rod. (Hint- after the end of the day employ</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-7-3-bulbs-and-3-switches/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 7 | (3 Bulbs and 3 Switches) </div> <div class="gfg-similar-read-item-subheading">There is a room with a door (closed) and three light bulbs inside the room. Outside the room, there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you canât change them. All bulbs are in working condition and you can open the door</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-15-camel-and-banana-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 15 | (Camel and Banana Puzzle) </div> <div class="gfg-similar-read-item-subheading">A person has 3000 bananas and a camel. The person wants to transport the maximum number of bananas to a destination which is 1000 KMs away, using only the camel as a mode of transportation. The camel cannot carry more than 1000 bananas at a time and eats a banana every km it travels. What is the max</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-7-find-the-jar-with-contaminated-pills/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 8 | (Find the Jar with contaminated pills) </div> <div class="gfg-similar-read-item-subheading">Puzzle: You have 5 jars of pills. Each pill weighs 10 grams, except for contaminated pills contained in one jar, where each pill weighs 9 grams. Given a scale, how could you tell which jar had the contaminated pills in just one measurement? Solution: To find the contaminated Jar, follow this step-wi</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-10-a-man-with-medical-condition-and-2-pills/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 10 | (A Man with Medical Condition and 2 Pills) </div> <div class="gfg-similar-read-item-subheading">Puzzle: A man has a medical condition that requires him to take two kinds of pills, call them A and B. The man must take exactly one A pill and exactly one B pill each day, or he will die. The pills are taken by first dissolving them in water. The man has a jar of A pills and a jar of B pills. One d</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-13-100-prisoners-with-redblack-hats/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 13 | (100 Prisoners with Red/Black Hats) </div> <div class="gfg-similar-read-item-subheading">100 prisoners in jail are standing in a queue facing in one direction. Each prisoner is wearing a hat of color either black or red. A prisoner can see hats of all prisoners in front of him in the queue, but cannot see his hat and hats of prisoners standing behind him. The jailer is going to ask colo</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-24-10-coins-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 24 | (10 Coins Puzzle) </div> <div class="gfg-similar-read-item-subheading">You are blindfolded and 10 coins are placed in front of you on the table. You are allowed to touch the coins but canât tell which way up they are by feel. You are told that there are 5 coins head up, and 5 coins tails up but not which ones are which. Can you make two piles of coins each with the sam</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-14-strategy-for-a-2-player-coin-game/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 14 | (Strategy for a 2 Player Coin Game) </div> <div class="gfg-similar-read-item-subheading">Puzzle: Consider a two-player coin game where each Player A and Player B gets the turn one by one. There is a row of even number of coins, and a player on his/her turn can pick a coin from any of the two corners of the row. Â The player that collects coins with more value wins the game. Develop a str</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">5 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-19-poison-and-rat/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 19 | (Poison and Rat) </div> <div class="gfg-similar-read-item-subheading">There are 1000 wine bottles. One of the bottles contains poisoned wine. A rat dies after one hour of drinking the poisoned wine. How many minimum rats are needed to figure out which bottle contains poison in hour. Solution:We need to figure out in hour. We need 10 rats to figure out the poisoned bot</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-20-5-pirates-and-100-gold-coins/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 20 | (5 Pirates and 100 Gold Coins) </div> <div class="gfg-similar-read-item-subheading">There are 5 pirates, they must decide how to distribute 100 gold coins among them. The pirates have seniority levels, the senior-most is A, then B, then C, then D, and finally the junior-most is E. Rules of distribution are: The most senior pirate proposes a distribution of coins.All pirates vote on</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-31-minimum-cut-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 31 | (Minimum cut Puzzle) </div> <div class="gfg-similar-read-item-subheading">Puzzle: You have got someone working for you for five days and a gold bar to pay him. You must give them a piece of gold at the end of every day. What are the fewest number of cuts to the bar of gold that will allow you to pay him 1/5th each day? Answer: 2 cuts. Solution: Explanation 1: After two cu</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-34-prisoner-and-policeman-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 34 | (Prisoner and Policeman Puzzle) </div> <div class="gfg-similar-read-item-subheading">Policeman decided to punish the Prisoner and asked him to make a statement. The Prisoner should make such a statement so that he would be alive. If the statement is held true by Policeman, the Prisoner will be hanged to death and if the statement is held false, the Prisoner will be shot dead. Answer</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-36-matchstick-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 36 | (Matchstick Puzzle) </div> <div class="gfg-similar-read-item-subheading">Question: How to make 4 equilateral triangles with 6 identical match sticks? Method - I: Make a tetrahedron. Method-II: Method - III: Make one equilateral triangle by three sticks . then put each remaining stick on straight line passing through middle points of each two arms of triangle. Method IV:</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/missionaries-and-cannibals/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Missionaries and Cannibals </div> <div class="gfg-similar-read-item-subheading">Question: In the missionaries and cannibals problem, three missionaries and three cannibals must cross a river using a boat which can carry at most two people, under the constraint that, for both banks, if there are missionaries present on the bank, they cannot be outnumbered by cannibals (if they w</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-41-guess-color-of-hat/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 41 | (Guess Color of Hat) </div> <div class="gfg-similar-read-item-subheading">There are 20 people standing in a line, one behind the other. Each is made to wear a hat, which can either be white or black. There can be any number of white or black hats between 0 and 20. Each person can see the hat of all the persons ahead of him in the line, but not those of the people standing</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-43-muddy-heads/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 43 | Muddy Heads </div> <div class="gfg-similar-read-item-subheading">A mother tells her two children, a boy and a girl, to play without getting dirty. However, while playing, both children get mud on their foreheads. The mother says âAt least one of you has a muddy foreheadâ. She then asks the children to answer âYesâ or âNoâ to the question: âDo you know whether you</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-heaven-hell/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Heaven and Hell </div> <div class="gfg-similar-read-item-subheading">There are two gates, one to hell and the other to heaven. Two gatekeepers, one for each gate. One of them always speaks the truth and the other always lies but you don't know which one guards which gate. You are allowed only one question and you need to find out the gate to heaven. What is the quest</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-mislabeled-jars/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Mislabeled Jars </div> <div class="gfg-similar-read-item-subheading">Puzzle : There are 3 jars, namely, A, B, C. All of them are mislabeled. Following are the labels of each of the jars: A: CandiesB: SweetsC: Candies and Sweets (mixed in a random proportion) You can put your hand in a jar and pick only one eatable at a time. Tell the minimum number of eatable(s) that</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-8-balls-problem/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 8 balls problem </div> <div class="gfg-similar-read-item-subheading">Puzzle: You are provided with 8 identical balls and a measuring instrument. 7 of the eight balls are equal in weight and one of the eight given balls is defective and weighs less. The task is to find the defective ball in exactly two measurements. Solution: Step 1: Divide the balls into three catego</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/cheryls-birthday-puzzle-and-solution/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 51| Cherylâs Birthday Puzzle and Solution </div> <div class="gfg-similar-read-item-subheading">(Wiki) Cheryl's Birthday is the unofficial name given to a mathematics brain teaser that was asked in the Singapore and Asian Schools Math Olympiad, and was posted online on 10 April 2015 by Singapore TV presenter. It is an interesting problem and might be asked in the interviews. It is based on log</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-measure-4l-using-given-3-buckets/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Measure 4L using given 3 buckets </div> <div class="gfg-similar-read-item-subheading">Suppose you have 8L, 5L and a 3L bucket with you. The buckets have no measurement lines on them and you are asked to measure exactly 4L of water using the three buckets. How could you measure exactly 4L water using only those buckets and provided you have as much extra water as you need ? Solution:-</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-3-priests-3-devils-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 3 Priests and 3 devils Puzzle </div> <div class="gfg-similar-read-item-subheading">There are 3 devils and 3 Priests.They all have to cross a river in a boat.Boat can only carry two people at a time.As long as there are equal number of devils and priests,then devils will not eat Priest.If the number of devils are greater than the number of priests on the same side of the river then</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-farmer-goat-wolf-cabbage/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Farmer, Goat, Wolf and Cabbage </div> <div class="gfg-similar-read-item-subheading">There is a farmer who wishes to cross a river but he is not alone. He also has a goat, a wolf, and a cabbage along with him. There is only one boat available which can support the farmer and either of the goat, wolf or the cabbage. So at a time, the boat can have only two objects (farmer and one oth</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-water-jug-problem/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Water Jug Problem </div> <div class="gfg-similar-read-item-subheading">We have two water jugs, one measures 4 Gallons (4G) while the other measure 9 Gallons (9G). But there is no measuring label mentioned on either of these two jugs i.e. we cannot know the exact amount filled in the jug. Now, assuming there is an infinite amount of water supply, can we measure all 1G,</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-blind-man-and-pills/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Blind man and Pills </div> <div class="gfg-similar-read-item-subheading">Puzzle: A blind man is alone on a deserted island. He has two blue pills and two red pills. He must take exactly one red pill and one blue pill or he will die. How does he do it? Solution: Way 1: Firstly, break each of the pills in half, and as you do this pop one half in your mouth and lay the othe</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-the-burning-candles/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | The Burning Candles </div> <div class="gfg-similar-read-item-subheading">Problem Statement: Given two candles. Each of them burns for one hour. They burn unevenly in different parts though. In addition, let's have a box of matches. Measure 45 minutes and 15 minutes. Solution: Step1: Both ends of the first candle should be lit, but only one end of the second candle should</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/birthday-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Birthday Puzzle </div> <div class="gfg-similar-read-item-subheading">Puzzle:On a new year day, two old friends (A and B) meet at a party. As they met after a long time person B wanted person A to guess his birthday. As both friends are not in touch for a long time person A was unable to guess his birthday. So person B decided to give some hints. Below are the hints:</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-rat-and-poisonous-milk-bottles/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Rat and Poisonous Milk Bottles </div> <div class="gfg-similar-read-item-subheading">You have 4 bottles of milk. One of them is poisonous while the other 3 are non-poisonous. There is a rat which dies exactly after 10 hours of drinking the poisoned bottle. You have a clock that measures time only in hours. Suggest an optimal strategy to identify the poisoned bottle within 24 hours.</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/measuring-6l-water-4l-9l-buckets/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Measuring 6L water from 4L and 9L buckets </div> <div class="gfg-similar-read-item-subheading">Question: Suppose you have a 4 liter jug and a 9 liter bucket . The buckets have no measurement lines on them either. How could you measure exactly 6 liter using only those buckets and you have as much extra water as you need ? Solution: Consider 2 buckets one 4L and other 9L. : Bucket 1 (4L) and Bu</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-six-houses-p-q-r-s-t-and-u/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Six Houses P, Q, R, S, T, and U </div> <div class="gfg-similar-read-item-subheading">There are three houses on each side of the road. These six houses are labeled as P, Q, R, S, T, and U. The houses are of different colors, namely, Red, Blue, Green, Orange, Yellow, and White. The houses are of different heights. T, the tallest house, is exactly opposite to the Red-colored house.The</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/melting-candles-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Melting Candles | Puzzle </div> <div class="gfg-similar-read-item-subheading">Problem Statement: There are two candles of equal lengths but of different thicknesses.The thicker candle lasts for 6 hours while the thinner one lasts for 2 hours lesser than the thicker one.A person lights the two candles at the same time and goes to play.After returning home, the person saw that</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-47-red-hat-vs-blue-hat/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 47 | Red Hat vs Blue Hat </div> <div class="gfg-similar-read-item-subheading">A team of three people decide on a strategy for playing the following game. Each player walks into a room. On the way in, a fair coin is tossed for each player, deciding that playerâs hat color, either red or blue. Each player can see the hat colors of the other two players, but cannot see her own h</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-find-the-culprit/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Find the Culprit </div> <div class="gfg-similar-read-item-subheading">Joe is a person who can't keep his secrets. He is that much careless that all his relatives and friends know his Debit Card PIN. Today Joe makes a profit of $1000. So he decided to throw a party and he invited his 3 friends: Leena, Paul, and Andrew. He was in a hurry to reach the home as soon as pos</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/fill-the-jug/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 54 | Fill the Jug </div> <div class="gfg-similar-read-item-subheading">There are two jugs each of 4 and 3 liters respectively , without any measuring marks. how many minimum steps are required to have 2 liters of water into the 4 litre jug (the jugs can be filled any number of times with water, and they can be emptied any number of times). Note that this puzzle is diff</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-46-true-or-false/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 46 | Rich or Poor </div> <div class="gfg-similar-read-item-subheading">A place has two kinds of residents, Poor, who always tell the truth, and their opposites, Rich, who always lie. You encounter two people A and B. What are A and B if A says âB is a Poorâ and B says âThe two of us are opposite typesâ ? Answer: Both A and B are Rich Solution: Let p and q be the statem</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-light-all-the-bulbs/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Light all the bulbs </div> <div class="gfg-similar-read-item-subheading">Problem Statement: Consider a circle with 2014 light bulbs and only 2 of them are on and the rest are off. Anyone can choose any of the bulbs and change the state of the neighboring bulbs. The task is to switch all the 2014 light bulbs on? Solution: Yes, it is possible to get all the light bulbs ON.</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-distribute-the-water/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Distribute the Water </div> <div class="gfg-similar-read-item-subheading">Problem Statement: Suppose there are three containers; container I (3L), container II (5L), container III (8L). Container III is filled with 8L of water while the other two are empty. With the help of these 3 containers, how to distribute the water in equal volumes i.e. 4L in container II and, 4L in</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-50-the-boat-wreckage/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 50 | The Boat Wreckage </div> <div class="gfg-similar-read-item-subheading">Letâs make this one easy! Ankur with his friends went to river the bank of river Ganges, as the exams are over for fun and recreation. But while crossing to other side of the river, a storm came and he along with fourteen other people are trapped in a boat in the mid of the river. None of them know</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/weight-heavy-ball/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Weight of Heavy Ball </div> <div class="gfg-similar-read-item-subheading">Puzzle: There are 2187 balls, out of which 1 is heavy. Find the minimum number of attempts the balls have to be weighed for finding out the heavy ball. Solution: The minimum amount of measurements needed to be done will be equal to 7 times. 2187 = 3^7 Step 1: Divide the 2187 balls into 3 equal group</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-guess-the-bit-string/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Guess the bit string </div> <div class="gfg-similar-read-item-subheading">Puzzle: Your friend thinks of an N bit string that will refer to it as a code. The task is to guess the code by asking your friend a series of queries. In each query, you can provide your friend with an N bit string of your choice, and your friend will tell you the number of bits in your string that</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">3 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Arrangement Puzzles<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-11-1000-coins-and-10-bags/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 11 | ( 1000 Coins and 10 Bags ) </div> <div class="gfg-similar-read-item-subheading">A dealer has 1000 coins and 10 bags. He has to divide the coins over the ten bags so that he can make any number of coins simply by handing over a few bags. How must divide his money into the ten bags? Solution: The idea of filling coins in the powers of 2 can be get from the condition that was give</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-23-days-of-month-using-2-dice/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 23 | (Days of month using 2 dice) </div> <div class="gfg-similar-read-item-subheading">Puzzle: How can you represent days of month using two 6 sided dice? You can write one number on each face of the dice from 0 to 9 and you have to represent days from 1 to 31, for example for 1, one dice should show 0 and another should show 1, similarly for 29 one dice should show 2 and another shou</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-38-tic-tac-toe-puzzle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 38 | (Tic Tac Toe Puzzle) </div> <div class="gfg-similar-read-item-subheading">Statement: The game of Tic-Tac-Toe is being played between two players and it is in below state after six moves. Can you answer following questions? Who will win the game, O or X? Which was the sixth mark and at which position? Assume that both the players are intelligent enough. Solution: O will wi</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-30-last-palindrome-data/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 30 | (Last Palindrome Date Before 10/02/2001) </div> <div class="gfg-similar-read-item-subheading">In year 2001 on October 2, 2001, the date in MMDDYYYY format was a palindrome (same forwards as backwards), 10/02/2001 -> "10022001" When was the last palindrome date before 10/02/2001? Answer: One year can have only one palindrome as the year fixes the month and date too, so the year has to be l</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-42-placing-the-numbers/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 42 | (Placing the numbers) </div> <div class="gfg-similar-read-item-subheading">Place the numbers 1, 2, 3, 4, 5, 6, 7, 8 into the eight circles in figure given below, in such a way that no number is adjacent to a number that is next to it in the sequence.For exampleÂ 1 should not be adjacent to 2 but can be adjacent to 3, 4, 5, 6, 7, 8. Similarly for others. We strongly recommen</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-10-balls-in-5-lines/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 10 Balls in 5 Lines </div> <div class="gfg-similar-read-item-subheading">Puzzle: Given are ten balls, the task is to place these 10 balls in five lines such that each line contain exactly 4 balls. Solution: The solution to the above puzzle can be obtained as: Draw the star with a pentagon in the centre. Place each ball at the intersection of extended lines of pentagon Th</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-round-table-coin-game/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | (Round table coin game) </div> <div class="gfg-similar-read-item-subheading">Suppose two player, player A and player B have the infinite number of coins. Now they are sitting near a perfectly round table and going to play a game. The game is, in each turn, a player will put one coin anywhere on the table (not on the top of coin already placed on the table, but on the surface</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-place-numbers-1-to-9-in-a-circle-such-that-sum-of-every-triplet-in-straight-line-is-15/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Place numbers 1 to 9 in a Circle such that sum of every triplet in straight line is 15 </div> <div class="gfg-similar-read-item-subheading">Place the numbers 1 to 9 in a circle, so that wherever there are three in a straight line they shall add up to 15. SOLUTION:[video mp4="https://media.geeksforgeeks.org/wp-content/uploads/20200710130155/wpv.mp4"][/video]The sum of first number and last number is ten ( 1 + 9 = 10 ).Similarly, the sum</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Shape based Puzzles<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-21-3-ants-and-triangle/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 21 | (3 Ants and Triangle) </div> <div class="gfg-similar-read-item-subheading">There are 3 ants sitting on three corners of a triangle. All ants randomly pick a direction and start moving along edge of the triangle. What is the probability that any two ants collide? Hint: Every ant has two choices (pick either of two edges going through the corner on which ant is initially sit</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-3-cuts-cut-round-cake-8-equal-pieces/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | 3 cuts to cut round cake into 8 equal pieces </div> <div class="gfg-similar-read-item-subheading">Puzzle: You have a birthday cake and have to cut it into 8 equal pieces by making 3 cuts only. How do you do it? Solution: The solution can be divided into 3 basic steps. But apart from this there are also other method of executing this task. Step 1: Cut the cake into quarters (4 pieces) using 2 of</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-25chessboard-and-dominos/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 25 | (Chessboard and dominos) </div> <div class="gfg-similar-read-item-subheading">There is an 8 by 8 chessboard in which two diagonally opposite corners have been cut off. You are given 31 dominos, and a single domino can cover exactly two squares. Can you use the 31 dominos to cover the entire board? Answer: No Explanation: At first, it seems that there were 8*8 = 64 squares the</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-three-squares/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Three Squares </div> <div class="gfg-similar-read-item-subheading">Given four sticks of length 'a' and four more sticks of length 'b'. The length of 'b' is exactly half of the length of 'a'. The task is to make three equal squares using the given 8 sticks. Solution: Below are the steps to make three equal squares from the given sticks: 1. Place the first stick of l</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-maximum-pieces-that-can-be-cut-from-a-circle-using-6-straight-lines/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Maximum pieces that can be cut from a Circle using 6 straight lines </div> <div class="gfg-similar-read-item-subheading">PUZZLE: Given a Circle and Six Straight Lines. What is the maximum number of pieces that one can cut the circle using these six straight lines? SOLUTION: Using six lines, we can cut the circle into 22 pieces at maximum. Using one line, the circle can be divided into two parts.Two lines divide the ci</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-splitting-a-cake-with-a-missing-piece-in-two-equal-portion/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Splitting a Cake with a Missing Piece in two equal portion </div> <div class="gfg-similar-read-item-subheading">Problem Statement: There are three friends who ordered a rectangular cake. One of them was in a hurry so he cut a rectangular piece from the cake. The piece could be of any arbitrary size(less than the size of the cake) and rotation. Now the remaining two friends want to divide the remaining cake in</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-48-rectangular-cardboard/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle 48 | Rectangular Cardboard </div> <div class="gfg-similar-read-item-subheading">Given, a rectangular cardboard with a rectangular piece removed(of any size and orientation) how one can cut the rectangular cardboard in two equal parts with one straight line cut. Solution: Using the fact: that âany line passing through the center of a rectangle divides the rectangle into two equa</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">1 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/puzzle-dividing-a-square-into-n-smaller-squares/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Puzzle | Dividing a Square into N smaller squares </div> <div class="gfg-similar-read-item-subheading">Puzzle: Find all values of N for which one can dissect a square into N smaller squares, and outline an algorithm for doing such a dissection. Solution: The basic point to observe is a square has 4 right-angles. So, to divide it into smaller squares each of its right-angle must fall into another squa</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">2 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Rubik's Cube<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/algorithm-to-solve-rubiks-cube/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Algorithm to solve Rubik's Cube </div> <div class="gfg-similar-read-item-subheading">A Rubik's Cube is an interesting puzzle invented by 'Erno Rubik' which has 43 quintillion possible configurations. But with the use of certain algorithms, it can be solved easily. There are many variations of the Rubix cube nowadays but the most basic one is the 3x3x3 Rubik's cube. A 3x3x3 Rubik's c</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/rubiks-cube-facts-and-questions/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Rubik's Cube Facts and Questions </div> <div class="gfg-similar-read-item-subheading">What is a Rubik's Cube?The Rubikâs Cube is a 3-D combination Puzzle that was invented in 1974 by Hungarian sculptor and professor of architecture ErnÅ Rubik. Rubikâs Cube is a Puzzle with a six-coloured cube, whose faces each include nine squares, eight of which can be rotated separately. In this ar</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">5 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Brain Teasers<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/brain-teasers/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Brain Teasers </div> <div class="gfg-similar-read-item-subheading">What are Brain Teasers? Brain teasers are puzzles or problems that are designed to stimulate and challenge the brain. They often require creative thinking, problem-solving skills, and the ability to think outside the box. 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They are a fun way t</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">8 min read</span> </div> </a><hr style="background:var(--gfg-selected-color); width:70%; margin: 0 auto;"></li></ul></div><div class="leftbar-dropdown"><h2 class="dropdown-title">Crossword Puzzle<span class="gfg-icon gfg-icon_arrow-down-thin"></span></h2><ul style="display: none;"><li class="similarReadDropdownItem"><a href="https://www.geeksforgeeks.org/crossword-puzzle-of-the-week-1-for-dsa/?ref=lbp"><div class="gfg-similar-read-item-content"> <div class="gfg-similar-read-item-heading">Crossword Puzzle Of The Week #1 (for DSA) </div> <div class="gfg-similar-read-item-subheading">In this issue of Crossword Puzzle of the week, we will dive into the topics of Data Structures and Algorithms (DSA). 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Puzzles can be of many types:- picture puzzles, logical puzzles, mathematical puzzles, etc. It is very helpf</div> </div> <div class="reading-time"> <i class="reading-time-icon" data-gfg-action="readingtime"></i> <span style="color: var(--recommendation-card-text-color);font-size: 14px;font-weight: 500;line-height: 17px;">4 min read</span> </div> </a></li></div></ul> </div> </div> <div class="vote-wrap"> <div style="display:none;align-items:center;justify-content:center;width:100%;"> <button aria-label="like" data-type="like" class="vote-this" style="margin-right: 0; margin-left:0 ;"> <i class="gfg-icon gfg-icon_like favoriteIcon"></i> <span class="favoriteLike">Like</span> <figure class="favoriteText"></figure> </button> </div> </div> </div> <div class="article-meta"> <div class="bottom-wrap"> <div id="GFG_AD_InContent_Desktop_BTF_650x250" style="text-align:center;max-height: 300px;"></div> </div>  </div> </div> </div> </div> <div id="report_modal_content" class="report_modal_content" style="display:hidden;"></div> <div class="onopen-discussion-panel"> <div class="discussion-tab"> <div class="discussion_heading"> <div></div> <i class="gfg-icon close-tab-icon"></i> </div> <div class="discussion_content"> <div style="height:100%"> <div style="height:100%" id="comment-system"></div> </div> </div> </div> </div> <div class="rightBar" style="padding-right: 5px;"> <style> .article--container_content{ align-items: unset !important; 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