All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. Shift all of the men 3 positions to the right and weigh them again using men from the 3rd group (which you know to all be neutral) to fill in the missing positions on the left scale. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. Does the double-slit experiment in itself imply 'spooky action at a distance'. Solution: The minimum number of times seesaw will be needed is 3. Thanks, AeJey for making it so clear! sideline: L1 L2 L3 S4 L4 R4 You signed in with another tab or window. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. And there you have it! There is an island with 12 islanders. If they are equal then. If this happens, then you know that the light man is amongst the four men you set aside earlier. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 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. 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. 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. Jordan's line about intimate parties in The Great Gatsby? A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. WRONG! 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. 2150 Condos - West Tower Phase 2 Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. Work fast with our official CLI. (Third Use), If the see saw is not balanced, remove one from each end. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. The one who is heavier is the different man (and heavier). Proceed to solution 2a. (seesaw measurement number 3). 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). i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. New post because the last one got too old. Three measurements in all. How to delete all UUID from fstab but not the UUID of boot filesystem. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, Ticket smash for [status-review] tag: Part Deux, Brooklyn Nine-Nine Riddle: Weighing Islanders, Building a 2 mile runway on a 1x1 mile island, Coin weighing with a single weighing device, Determine your weight from 2 different answers from 2 weighting scales. Now we know that the different man is among {9,10,11,12}. Use the {{3 remaining with known weight solution}} from solution 1a. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 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. 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. 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. The exciting catch? The best answers are voted up and rise to the top, Not the answer you're looking for? 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. sign in (seesaw measurement number 3), 2.B.2 if balanced How do you figure out which one is heavier? This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. However only three measurements are allowed. c) If they are the same, then one of 3,4 is different. The following steps become identical to those in Scenario 1., above. One of two things will happen: The seesaw will be perfectly balanced. But this is simple! There is a seesaw to determine who is the odd one out. Weigh the lighter of the 2 men against any other neutral man. Beach House Semis in Port Union Village. Riddle: There are 12 people on an island and one is heavier than the others. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. I am just looking for a little tweak to this answer. Was Galileo expecting to see so many stars? Thankyou for reading and understanding. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. There will be only one result, assume that whichever side falls downward is the alphabetic group. Thanks! 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. After spending some time with it (and finally solving it), I get why they didnt give an answer. This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. Wow how did this even get 8 upvotesmind boggling. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Happy problem solving. Thats really not conducive to Andy Samberg zingers. You can weigh three combinations of men on the see-saw. You must figure out which. There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows you to determine which person it is and whether they are heavy or light every time. Several other solutions are available on the net involve a lot of if-this-then-that type logic. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Press J to jump to the feed. (Second Use). Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. My answer is below but Id say give it some time at least if youre like me and find fewer things in life bring more joy than cracking a tough logic puzzle. The exciting catch? 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. There is an island with 12 islanders. 11 weigh exactly the same, but one of them is slightly lighter or heavier. There was a problem preparing your codespace, please try again. Before you read on, I just want to say that this problem drove me nuts. 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. Learn more about Stack Overflow the company, and our products. It only takes a minute to sign up. Weapon damage assessment, or What hell have I unleashed? If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Questions: 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). 2) They are different. 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. What is the answer to the seesaw riddle? A tag already exists with the provided branch name. Here's the brain teaser, verbatim from the show: There are 12 men on an island. The See-Saw. Weigh A against B. Learn more. Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, Ticket smash for [status-review] tag: Part Deux. If they are the same, 8 is the one we are looking for (and lighter). sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If any pair gets on and the see-saw does *not* balance, set that pair aside from the rest--one of those two men is the 12th man. Why do we kill some animals but not others? In step 3 place one unknown on each side. The ice cube and the basketball have the same weight. seesaw: S1 S2 S3 R1 R2 R3 (heavy) Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. If they are equal then Weigh 9, 10, 11 vs 1, 2, 3. Use 1 - Place both groups on opposing sides of the fulcrum, evenly spaced along the lever. Comparing (1,2,3,4) to (5,6,7,8) does exactly this. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. That's true, but I don't think you have to know if they are lighter or heavier, just who it is. Each islander is given a position to sit on the seesaw for each round. Connect and share knowledge within a single location that is structured and easy to search. [10, 11, 12, 1] VS. [2, 3, 4, 5]. It is a see saw, not a giant scale! If these are equal, the different man is 12. 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?. by Mikhael Panju v2. The seesaw will balance perfectly. 12 Islanders Riddle Puzzle from Brooklyn 99. (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. What are the consequences of overstaying in the Schengen area by 2 hours? 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.. There are two possible results. ie. a) If 1,2,5,6,7 is heavier, then either 1 or 2 heavier, or 8 is lighter. Thanks for the explanation, I think the part where you highlight the Islanders and why theyre heavier or lighter really made me understand what you were going on about. 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