The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". Otherwise the one who stayed is the oddly weighted one. heavier or slightly lighter. If one is heavier they are the odd one otherwise it is 6. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? IF the scales are equal, then you know it was one of the 3 men who were removed from the scale : 6-8. (Third Use)notethis works equally well if the group was lighter, just replace terms for appropriate identification. Create an account to follow your favorite communities and start taking part in conversations. 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). Put any two groups on each side of the see-saw. (seesaw measurement number 3), (first make sure you have the heavy side on the left), seesaw: L1 L2 L3 L4 (heavy) R1 R2 R3 R4 There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . Beach House Semis in Port Union Village. If they are equal then that must mean the 12th person is the different one. A classic logic puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2. Another coin weighing puzzle. A tag already exists with the provided branch name. 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. ((, Please explain your claim that is was not asked properly. In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. How do you figure out which one is heavier? Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. 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. IF the measurement is equal then the odd man is 12. IF the scales are unequal, but the balance of weight changes (ie. Questions: 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." You don't know if he is heavier or lighter, just that he is a different weight. 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. There are 2 possible outcomes, either they are equal, or unequal. IF the scales are still unequal but remain the same, then you know it was 1 of the 2 men who did not change sides, number 1 or 5. There will be only one result, assume that whichever side falls downward is the alphabetic group. Ackermann Function without Recursion or Stack. The pattern for all islanders is below: person: A B C . If balanced, the remaining unknonw is the odd one and can be determined in step 3. 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. Comparing (1,2,3,4) to (5,6,7,8) does exactly this. What are some tools or methods I can purchase to trace a water leak? One of two things will happen: 1) They are equal. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. New comments cannot be posted and votes cannot be cast. There was a problem preparing your codespace, please try again. 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 your second seesaw turn to weigh those four (two on each side) to see which side is heavier. (Third Use), If the two groups of 4 don't balance remember which side was lighter, have three get off one end and the remaining person swap places with one of the other four. if balanced it is R4 - else it is the lighter of R3 and R2 It is impossible to know both for sure in only three steps." rev2023.3.1.43268. There is also a see-saw on the island. You can shift some of them onto the see saw with the other men and bump some off (aka. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. The second measurement was equal, so you know that the odd man is within the group 6-8. seesaw: S1 S2 S3 R1 R2 R3 (balanced) test all the cases: go test . So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. sorry my bad. 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. Feel free to provide your own comment and I can delete this one. " How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? (A reason why this brain teaser might seem frustrating and impossible to some is because it is only asking for the odd person out and not also whether they are lighter or heavier. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. It only takes a minute to sign up. I actually figured this out on my own this evening while out walking my dog. There are 12 men on an island. If they are equal, it is the remaining man not being measured. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. The seesaw will NOT be perfectly balanced. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. I am just looking for a little tweak to this answer. This way of wording will help make it easier to figure out the puzzle. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. So in principle, we should be able to solve the problem. Weigh 1 against 2. Now put 7 on one end and 8 on the other. Hope you all sleep well after reading this. Is the set of rational points of an (almost) simple algebraic group simple? Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Logic Logic puzzles require you to think. You can use the see-saw to figure out which is the odd man, but you can only use it 3 times. Weigh the lighter of the 2 men against any other neutral man. The answer to 12 Men On An Island Riddle is " First weigh 1, 2, 3, 4 vs 5, 6, 7, and 8 on the seesaw to see if they are equal. I gave each of the 12 men a letter, A-L. Can You Solve the Brain Teaser of the 12 Men and a See-Saw? 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. Why do we kill some animals but not others? If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. 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?. (seesaw measurement number 3), 2.A.3 if right is heavy They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. The exciting catch? (First Use). III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. We are trying to find which of them is a non-standard weight or x = one of them. 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. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. You must figure out which. If not balanced, the one going down is heavy. There is an island with 12 islanders. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. The only thing you can use is a see-saw, which can balance one man or group of men against another man or group of men. Javascript wrangler and Beer Baron at Aconex, the same number of islanders are always on each side of the seesaw, the opposite of each used pattern is not used. (Second Use). 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). Use the third and final seesaw use to determine if the 12th person is the heavier or lighter islander (i.e. Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. Take note of whether it is heavier or lighter. One problem - you have to figure out which person it is too. note this works equally well if the group was lighter, just replace terms for appropriate identification. Press J to jump to the feed. Presented below is a simpler solution. rev2023.3.1.43268. The first measurement of 4 vs. 4 was equal. If they are equal, A4 is heavier. The See-Saw. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. Have something to tell us about this article? If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. *** NOTE : If you want to try for a solution by yourself, do not read beyond this point. The following steps become identical to those in Scenario 1., above. There is not one definitive answer, more so, multiple ways to attain the answer. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. You can weigh three combinations of men on the see-saw. sideline: S1 S2 S3 S4. If they are equal then it is the one not being measured and he is heavier. Each step here corresponds to one weighing. 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. Use the {{3 remaining with known weight solution}} from solution 1a. It is impossible to know both for sure in only three steps.). I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. sideline: S1 S2 S3 S4, 2.A.1 if balanced Was Galileo expecting to see so many stars? Can you solve the classic 12 marbles riddle? WRONG! Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. if balanced it is S3 - else it is the lighter of S1 and S2. Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. One of two things will happen: The seesaw will be perfectly balanced. Heres the brain teaser, verbatim from the show: There are 12 men on an island. now compare R2 and R3. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. You can only use it three times. In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. Works the other way around with "light" and "up" instead of "heavy" and "down", "It is impossible to know both for sure in only three steps". 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. 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. Therefore you know that the odd man is one of the remaining people on the scale that did not change sides, 1 or 5, but you do not know if the odd man is heavier or lighter. sideline: S1 S2 S3 S4 Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. One of the islanders weighs slightly more or less then the other 11, and you must discover which, by placing islanders in groups on the seesaw. It is a see saw, not a giant scale! Start off by weighing 4 against 4, setting the other 4 aside completely. THIS TIP WILL GIVE AWAY THE MAIN SECRET : Instead of just breaking the men up into groups and comparing those groups against each other, you can shift them from one side of the see saw to the other side. (seesaw measurement number 3), 2.B.2 if balanced It will halve 8 unknowns on the first balance, four on the second and two on the third. And there you have it! 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. Connect and share knowledge within a single location that is structured and easy to search. Weigh 9, 10, 11 vs 1, 2, 3. The side that is lighter has the men switch positions getting closer or further from the fulcrum without coming on or off the see saw, after all of the positions have been tried, if the see saw does not move, it means all the men on that side are of equal weight, if the balance is lost, the last man to move before the balance is lost is the lighter man. Your aim is to find out which person weighs a different amount. And if they are also equal then that would mean that the 12th person weighs different. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. (Detailed . Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. There are 12 men on an island. Just forget about them for a few minutes. If however you DO know that the odd man is either heavier or lighter, then you can figure it out in 1 step by comparing 2 men from those 3 against each other. It is of indeterminate length I wish for my see saw to be long enough to place 12 on either side, but only six will be on either side of the fulcrum. Men on an island puzzle - Utopia Mechanicus there are 12 men on an island with islanders! Different groups of islanders below: person: a B C, Please explain claim! Solve the brain teaser of the repository happen: the seesaw balances we know either... 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