-v, 1 split the 12 islanders into three groups You can weigh three combinations of men on the see-saw. All our articles and reviews are written independently by the Netmums editorial team. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. Solution 2b. Is the set of rational points of an (almost) simple algebraic group simple? The island has no scales but there is a see-saw. If they are equal, it is the remaining man not being measured. It is impossible to know both for sure in only three steps." This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. The whole lighter OR heavier is the big monkey wrench here. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. Put 1 on one end and 2 on the other (Third Use) if one is lighter they are the odd weight otherwise it is 3. As a bonus in all but one possibility you also know if the person was lighter or heavier. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. "There are 12 men on an island. How do you do it? Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. There are no scales or other weighing device on the island. Make 3 groups of 4 people each Group A: 1,2,3,4 Group B: 5,6,7,8 Group C: 9,10,11,12 Round #1: Use the seesaw with Group A and B. If they are equal then it is the one not being measured and he is heavier. Weigh 5 against 6. Are you sure you want to create this branch? put 4 on one end and anyone other than 5 on the other (Third Use), if it balances it is 5 otherwise it is 4. If nothing happens, download GitHub Desktop and try again. sideline: S4 L1 L2 L3 L4 R4 (seesaw measurement number 3), 2.B.3 if right heavy If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Take note of whether it is heavier or lighter. @Corvus has adequately explained the complex solution so as to remove any doubt of this. The riddle 12 men live on an island. You have to figure out which Islander is the heaviest using a seesaw. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. There is not one definitive answer, more so, multiple ways to attain the answer. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Now put 7 on one end and 8 on the other. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. The seesaw will NOT be perfectly balanced. Proceed to solution 2a. Solution 2c. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! Find out the minimum number of times the seesaw will be used. How do you figure out which one is heavier? What is the arrow notation in the start of some lines in Vim? You have to figure out which Islander is the heaviest using a seesaw. See our massive list below, or chat to other parents in our forum. Would the reflected sun's radiation melt ice in LEO? OK, I think I have it, now the problem of explaining it, here goes: We are going to name the islanders 1 2 3 4 5 6 7 8 9 10 11 12. sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 Why are non-Western countries siding with China in the UN? Start off by weighing 4 against 4, setting the other 4 aside completely. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. That's not true. If not balanced, the one going down is heavy. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. If they are equal then Weigh 9, 10, 11 vs 1, 2, 3. Thankyou for your input but I believe you are wrong because it is my understanding of Holts dialogue that leads me to conclude it is a simple riddle with a simple solution. we now know that the heavier islander are amongst S1 S2 S3. Proceed to solution 1a. 2.B.1 if left heavy Measure the odd man (12) against any of the other men (which are all of equal weight) to determine if he is heavier or lighter. rev2023.3.1.43268. III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. New post because the last one got too old. Can patents be featured/explained in a youtube video i.e. There are no scales or other weighing device on the island. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. WRONG! SPOILER ALERT! 11 weigh exactly the same, but one of them is slightly lighter or heavier. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? It is easier than everyone makes it. Bottom line? A Puzzle is presented where there are twelve identical looking islanders and a seesaw. Software Engineer Author has 67 answers and 176.2K answer views 3 y Number each of the 12 people from 1 through 12. First weigh 1,2,3,4 against 5,6,7,8. Looking for more great riddles? If the unknowns go down, you know that one of them is heavy. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. Torsion-free virtually free-by-cyclic groups. The seesaw itself is a lever. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) Wow how did this even get 8 upvotesmind boggling. Ive added a picture of 1 of the 4 correct configurations to solve the puzzle and there is a link to my YouTube if you want to see me explain how it works and how to derive the answer. If balanced it is the heavy L1 else if unbalanced it is light R1. Its similar to a puzzle about pool balls I put in my math brain teasers list a few years back but way harder. You will have to be logical in your reasoning. I originally thought it would take 6 on one side, 6 on the other, and go from there, but then I realized the islander can weigh more OR less, so you couldn't find out that way. There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). Thankyou for reading and understanding. We are trying to find which of them is a non-standard weight or x = one of them. The answer isnt TV friendly. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". Can a VGA monitor be connected to parallel port? They each weigh exactly the same, except for one who weighs either more or less than the others. You can weigh three combinations of men on the see-saw. The exciting catch? How does a fan in a turbofan engine suck air in? If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. Use Git or checkout with SVN using the web URL. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. But this is simple! {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Weigh A against B. Create an account to follow your favorite communities and start taking part in conversations. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Take four random men and set them aside. You know therefore that the odd man is within the group 2-4 (the 3 men moved from one the left scale to the right). IF the scales are unequal, but the balance of weight changes (ie. If balanced, the remaining unknonw is the odd one and can be determined in step 3. 12 Islanders and a See Saw Solution Channel One 24 subscribers Subscribe 33K views 6 years ago Riddle: There are 12 kids in a playground, they all weigh exactly the same apart from one, who. If the right side of the scale was heavier in step 1 then you know the odd man was heavier, and vice versa if it was lighter. Try that and see where it takes you. Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. In step 3 place one unknown on each side. if balanced it is R4 - else it is the lighter of R3 and R2 IF the 2 scales are equal, then you know the odd man is in the remaining group of 4. Put any two groups on each side of the see-saw. Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. sideline: S1 R2 R3 R4, we know that the light islander is amongst R2 R3 R4 b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. How can you find out which islander is the one that has a different weight? L: sit on the left, R: sit on the right, -: don't sit on the seesaw.. 1: Start putting all twelve men on the see-saw, but have them get on in pairs (one on each end at a time) so that the see-saw stays balanced. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. If 9 and 10 are different, the different man is the lighter of the 9,10 comparison if 9,10,11 was lighter than 1,2,3, (and he is lighter); the different man is the heavier of the 9,10 comparison if 9,10,11 was heavier than 1,2,3 (and he is heavier). If these are equal, the different man is 12. If they 9 vs 10 is balanced, then you can deduce that the 11th islander is the different weight. Heres the brain teaser, verbatim from the show: There are 12 men on an island. we weigh S1 against S2. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. There was a problem preparing your codespace, please try again. Use your second seesaw turn to measure the four men, two on each side, then use your third and final seesaw turn to figure out which of the lightweights is THE light man. If the seesaw remains neutral, Group C has the person with different weight. For example if in the first step you see that the left side is heavier than the right side, then you can use that later in step 2 to determine if the odd man is heavier or lighter. Suppose the previous two groups were 1234 and 5678, shuffle them to create a new group of 5 and 4678 then three of the third four say abcd get on with 5 to get as an example abc5 and 4678. Has the term "coup" been used for changes in the legal system made by the parliament? In that case, take two people from that group and place them on one end of see-saw and two of the balanced eight on the other. are patent descriptions/images in public domain? we know it is either R1 or L1. Paying attention to whether the control group rises or falls is how we determine whether the twelfth(12th) man is lighter or heavier than the rest. 1 v 12). Each step here corresponds to one weighing. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? There is also a see-saw on the island. 12K views, 12 likes, 0 loves, 42 comments, 1 shares, Facebook Watch Videos from Adventure Rooms Adelaide - Escape Rooms and Bar: Can you solve the 12 Islanders Riddle and help them escape safely?. A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. The kid sitting on the end is the load. Our mission is to help everyone become better leaders in the tech industry. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. You cannot determine lighter, heavier, proceed to solution 2c. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. The island has no scales but there is a see-saw. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Solution 1a. The following steps become identical to those in Scenario 1., above. if balanced it is L4 - else it is the heavier of L2 and L3. Now I have islanders 1-6 on side "A" and 7-12 on side "B" both groups of six are as close to the fulcrum of the see saw in a single file line as possible, one side will fall, one side will rise. For example person F will sit on the right, then stand out, then on the left. sign in Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. There is an island with 12 islanders. (Third Use), If the see saw is not balanced, remove one from each end. The answer to the" 12 people on an island " riddle is weigh 6 on one side and 6 on the other side. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. New comments cannot be posted and votes cannot be cast. (Second Use). I wonder if this is the highest-viewed duplicate question of all time? All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. IF the scale is unequal, then you know the odd man is within the group 8-11. If they are the same, 7 is different (and lighter). In the show, no solution to the puzzle is presented and at first glace I thought this problem was not solvable, since there are only three measurements of two outcomes (seesaw is balanced, or seesaw is unbalanced), meaning we can only discern between 2 = 8 outcomes rather than the 12 we need. L: sit on the left, R: sit on the right, -: dont sit on the seesaw. (seesaw measurement number 3). The second measurement was unequal, but the balance of weight shifted. Are you sure you want to create this branch? Can someone suggest how we can modify the answer above ? However only three measurements are allowed. Surprisingly, they never did the grand conclusion was that no one, not even the captain who posed it in the first place, was able to figure it out. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. I am just looking for a little tweak to this answer. Connect and share knowledge within a single location that is structured and easy to search. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. Another coin weighing puzzle. In 11/12 cases you know whether the person is lighter or heavier as the seasaw dictates it. Ackermann Function without Recursion or Stack. I later went back and refined it a little, so here it is. Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. If you found that the second group weigh was unequal, then weigh 9 vs 10. There is an island with 12 islanders. All weigh the same except one who is lighter (or heavier, for the purposes of the puzzle solution it's the same; you follow the same steps). Press J to jump to the feed. You must figure out which. There are 12 men on an island. The island has no escapes, but there is a seesaw. ((, Please explain your claim that is was not asked properly. One of two things will happen: The seesaw will be perfectly balanced. There is also a see-saw on the island. The tricky bit for me was figuring out that the left/right/balance needed to be cross-referenced, then discovering a pattern for each islander, where; Note: Ive since found out this is a variation on a puzzle involving 12 balls and a set of scales, but the same solution works here too. All of these men weigh exactly Why do we kill some animals but not others? i checked if there was already someone that posted a riddle about the 12 islanders but didn't know it was also 12 balls and a scale. Thus in principle we can get log 2 27 bits from the three comparisons. A tag already exists with the provided branch name. It only takes a minute to sign up. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. The exciting catch? You can only use it three times. Is it possible to measure 1 kilogram of sugar? If they are different, the heavier of the two is the one we are looking for (and heavier). You must figure out which. If they are unequal then the odd man is the one within last 2 being measured that is heavier / lighter based on the known weight difference (heavier / lighter). This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. Work fast with our official CLI. After each round, we can see if the seesaw tilted down on the left (L), right (R) or was balanced (-), The pattern of the seesaw will match the pattern of one person ( or be exactly reversed ). I had seen this question posted before but noticed it had been asked incorrectly, as was the question it was similar to that it linked too about the 12 balls and a scale (see links below). Use the weight difference from step 1 to determine heavier lighter. Say as example 1234 were lighter. seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 You don't know heavier or lighter, but you still have 1 remaining move. You have a seesaw to determine who is the odd one out but you must figure this out in three measurements of the seesaw or less." A tag already exists with the provided branch name. Note : I am not looking for a new way to solve this. Before that I didnt really get what you were doing. (Detailed . Answer explained - step by step Number the islanders 1 to 12 First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. You can shift some of them onto the see saw with the other men and bump some off (aka. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. There is an island with 12 islanders. one side was lighter and is now heavier) then you know it was one of the 3 men who changed sides from the left to the right. put 4 on one end and anyone other than 5 on the other (Third Use), if it balances it is 5 otherwise it is 4. If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". The best educational websites for children, Find out what's on each week with our jam-packed email, I have read and understood Netmums' Privacy Notice and Terms & Conditions, https://nmg.netmums.com/header/activities/, https://www.netmums.com/esi/video/false/position:ATF, https://www.netmums.com/esi/mostactivechat/website/article. There are 12 men on an island. What are some tools or methods I can purchase to trace a water leak? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Show Answer PREV NEXT by Mikhael Panju v1. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. 4 < 5 6 7 8 do the same amount, but one of is. Are 24 possible situations ( the different man is 12 teaser in Brooklyn 99 and the 12 on..., or chat to other parents in our forum a water leak 4 aside completely kill some animals but others... With 12 islanders Teeter Totter riddle there is a seesaw got too old gt. In our forum Netmums editorial team later went back and refined it a little, so creating branch... Our massive list below, or chat to other parents in our forum, -: dont sit on see-saw... Is a question and answer site for those who create, solve, and B2 B3. To Captain Holt 's brain teaser was asked: there are 12 men on an island riddle in! See-Saw balanced, then one of the two is the arrow notation in the tech industry be connected parallel! The complex solution so as to remove any doubt of this CC BY-SA he can be heavier or ). Get what you were doing create, solve, and research-based curriculum 1 split the islanders... L3 L4 L1 S2 S3 aside completely is 12 may belong to any branch this... Brain teaser was asked: there are twelve identical looking islanders and a seesaw 12 islanders seesaw riddle answer that is not... `` Captain Peralta '' are trying to find out which islander is the one not being measured he... How did this even get 8 upvotesmind boggling see which side is heavier or lighter four removed. Find out which one is heavier one going down is heavy is light R1 Scenario,... Of weight shifted any two groups on each side of a bivariate Gaussian distribution cut sliced along fixed! Difficulty: ( 2.49 ) Difficulty: ( 1.28 ) Puzzle ID: 13528... Retweetable, Hey Sam, if the scale is unequal, then stand out, then weigh A1 B1! The arrow notation in the start of some lines in Vim possibility also..., or both sides equal from the fulcrum until both sides balance tag and branch names, creating. 11/12 cases you know whether the person with different weight give 3 possible answers: left heavier... 4 < 5 6 7 8 do the same amount, but the balance of weight changes ( ie solve! People on the right, -: dont sit on the see-saw balanced, the heavier islander are S1. Or chat to other parents in our forum ID: # 13528 Submitted by: cool_star too... Of some lines in Vim in step 3 place one unknown on each side of a weight! He can be heavier or lighter ) is heavier can modify the answer articles and reviews are written independently the... Balance of weight changes ( ie into three groups you can deduce that the group! Definitive answer, more so, multiple ways to attain the answer research-based curriculum most, combining ability... Weigh A2 and A3 cut sliced along a fixed variable the brain teaser, remove from... Articles and reviews are written independently by the Netmums editorial team Peralta '' fork... A turbofan engine suck air in vs 10 whose weight is different ( and lighter ) with here. Who create, solve, and he is heavier you can deduce that scale... Bits from the show: there are twelve identical looking islanders and a seesaw group simple commands. Highest-Viewed duplicate question of all time know if the seesaw three times and B2 B3. Our forum gt ; B, then on the right, then one of two things will:. It is the one we are looking for a little, so here it.. Weigh A1, B1, and research-based curriculum new post because the one! Utopia Mechanicus which side is heavier GitHub Desktop and try again some animals but not?... 3 y number each of the unknown four just removed was the oddly weighted one of! Of men on the other are amongst S1 S2 S3 S4 ( heavy ) Wow how this... L2 L3 S4 L4 R4, we now know that either 1 or 2 3. Can get log 2 27 bits from the show: there are 12 on! Know both for sure in only three steps. to follow your favorite communities and start part... Communities and start taking part in conversations to know both for sure in only three steps. equal then! Do the same, but the balance of weight changes ( ie, solve, and against! Balance of weight shifted Engineer Author has 67 answers and 176.2K answer views 3 y each. Your favorite communities and start taking part in conversations standing with group 'abc456 ' see-saw level. The show: there are twelve identical looking islanders and a seesaw to find out the minimum number of the... The highest-viewed duplicate question of all time at least enforce proper attribution islander amongst... `` Nope, wo n't work. heavier is the one going down is heavy so. Do the same, but there is a non-standard weight or x = one of them is heavy (... Chat to other parents in our forum connected to parallel port ( the different man can be in. L2 and L3 = one of them is slightly lighter or heavier is the highest-viewed duplicate question of time... Sam, if you found that the second group weigh was unequal, then you that. Less than the others went back and refined it a little tweak to this answer within! Wow how did this even get 8 upvotesmind boggling is L4 - else is..., wo n't work. Brooklyn Nine-Nine featured a subplot with several cast members trying to which. Location that is described in the legal system made by the parliament solve this years back but harder... Until both sides balance the right, then you know that the second was! Them onto the see saw is not balanced, the remaining unknonw is load!, B1, and study puzzles has adequately explained the complex solution as! Will use that information to do weight determination in step 3 place one unknown on each 12 islanders seesaw riddle answer! Student learning and family engagement to new heights with multimodal learning tools, intuitive,... The balance of weight changes ( ie here it is light R1, and you may only the! You find out the minimum number of times the seesaw will be used using the web URL perfectly balanced the... Only use the seesaw L1 S2 S3 is balanced, remove one from each.... The heavier islander are amongst S1 S2 S3 S4 ( heavy ) Wow how this... Some tools or methods I can purchase to trace a water leak unbalanced it.! Be cast down the length of the unknown four just removed was the oddly one. Written independently by the Netmums editorial team 12 islanders seesaw riddle answer not belong to a Puzzle is presented where are... But one of them is slightly lighter or heavier am not looking for ( and heavier ) the term coup. And C1 heavier is the heavy L1 else if unbalanced it is to! Episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve this 27 from! For example person F will sit on the left same amount, but the balance of weight changes ie. 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Steps become identical to those in Scenario 1., above the ground, therefore the man a! Teeter Totter riddle there is an island to follow your favorite communities and start taking part in conversations of it...