It is easier than everyone makes it. Proceed to solution 1a. SO I CREATED A PROGRAM I created a simulator to play with this problem I just published it so anyone can use to prove your solution or just to play around. Now, weigh the remaining eight men on the seesaw, four on each side. All of these men weigh exactly You can only use it three times. Weigh 9,10,11 against 1,2,3. All of the men look perfectly identical to each other, but one of them is either heavier or lighter than all of the other men. You don't know if he is heavier or lighter, just that he is a different weight. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. Your aim is to find out which person weighs a different amount. Weigh 9, 10, 11 vs 1, 2, 3. Why do we kill some animals but not others? Jordan's line about intimate parties in The Great Gatsby? heavier or slightly lighter. I concede that my previous hypothesis about the validity of the question was false. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. The seesaw will NOT be perfectly balanced. sideline: S1 S2 S3 S4. You still have 1 remaining move and you now know if the odd man is heavier or lighter. The riddle 12 men live on an 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. There is also a see-saw on the island. 2.B.1 if left heavy If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Now you know that one of the four men on one side is light. If the seesaw remains neutral, Group C has the person with different weight. If one is heavier they are the odd one otherwise it is 6. You cannot determine lighter, heavier, proceed to solution 2c. 42 votes, 14 comments. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. Show Answer PREV NEXT by Mikhael Panju v1. 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. Both situations are ideal as they reveal to us which group is the control group or standard for the weight of eleven of the men. 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? Each islander is given a position to sit on the seesaw for each round. 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. If not balanced, the one going down is heavy. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. if balanced it is L4 - else it is the heavier of L2 and L3. Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. I can do this in one move, where no one gets off the see saw, and they only get on it once. (Detailed . Use Git or checkout with SVN using the web URL. See our massive list below, or chat to other parents in our forum. (We could always relabel the men so that this is true). Is it possible to measure 1 kilogram of sugar? The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. Several other solutions are available on the net involve a lot of if-this-then-that type logic. Remember that you can use the information from each step in the next step. If this happens, then you know that the light man is amongst the four men you set aside earlier. You will have to be logical in your reasoning. There is an island with 12 islanders. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Let's say 'abc' and '456'. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. How can you find out which islander is the one that has a different weight? This gives you your man. Another coin weighing puzzle. As a bonus in all but one possibility you also know if the person was lighter or heavier. Big O(n) Development is a non-profit initiative that aims to fill in the gap around helping individuals and teams in the tech community around career progression and tech leadership skills. Can you solve the classic 12 marbles riddle? Connect and share knowledge within a single location that is structured and easy to search. Edit: 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. 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". How do you do it? sideline: L1 L2 L3 S4 L4 R4 So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. Now put 7 on one end and 8 on the other. If nothing happens, download GitHub Desktop and try again. There is an island with 12 islanders. now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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?. You must figure out which. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Similar logic will help us design all further comparisons. sideline: S1 S2 S3 S4, 2.A.1 if balanced Find out the minimum number of times the seesaw will be used. IF the scale is unequal, then you know the odd man is within the group 8-11. seesaw: S1 S2 S3 (heavy) R1 R2 R3 Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. What are the consequences of overstaying in the Schengen area by 2 hours? If they are equal then. If the light side men are all of equal weight, the heavy side is then ordered to switch positions until the balance is no longer achieved, when the balance is lost, the last man to move is the heavier man. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. There are 12 men on an island. There you have it, no islanders ever get off the see saw, and they just get on it once. ie. now compare R1 against a neutral islander (S1 for example). seesaw: S1 S2 S3 R1 R2 R3 (balanced) 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. That person is the heavier (or lighter). 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." Are you sure you want to create this branch? The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. It is a good write up though. This is the true solution from Captain Holt's brain teaser from Season 2 Episode 18 of Brooklyn 99 : "Captain Peralta." The nice thing about this approach is that the logic is very simple (you just need to know the pattern) and you will always find out whether the person is lighter or 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. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Why are non-Western countries siding with China in the UN? You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. And there's another twist: you're only allowed to use the see-saw three times. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Hope you all sleep well after reading this. 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). If you found that the second group weigh was unequal, then weigh 9 vs 10. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 If he is lighter then it is the one being measured and he is lighter. A seesaw is binary. There are no scales or other weighing device on. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? There are 12 men on an island. we weigh S1 against S2. 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. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. There are 12 men on an island. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. The exciting catch? Looking for more great riddles? A Puzzle is presented where there are twelve identical looking islanders and a 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. There are two possible results. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Each step here corresponds to one weighing. Three measurements in all. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! You must figure out which. IF the measurement is equal then the odd man is 12. we know it is either R1 or L1. You have to figure out which Islander is the heaviest using a seesaw. The seesaw will balance perfectly. This page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. (seesaw measurement number 3), 2.B.3 if right heavy If balanced it is the heavy L1 else if unbalanced it is light R1. Before you read on, I just want to say that this problem drove me nuts. If they are the same, the different man is 11, and he is heavier if 9,10,11 was heavier than 1,2,3 and he is lighter if 9,10,11 was lighter than 1,2,3. If still balances, we know that the fourth one, who has not sat on the see-saw from that group is the one oddly weighted. The exciting catch? (seesaw measurement number 3), 2.A.3 if right is heavy 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. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. Heres the brain teaser, verbatim from the show: There are 12 men on an island. If they are equal, it is the remaining man not being measured. 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. If they are different, the heavier of the two is the one we are looking for (and heavier). After you do your fist step you will have eliminated some of the men as possiblilities (they are neutral). 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. 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. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. I actually figured this out on my own this evening while out walking my dog. PTIJ Should we be afraid of Artificial Intelligence? 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. 1 v 12). The island has no scales but there is a see-saw. Are you sure you want to create this branch? (Second Use). test all the cases: go test . It is a see saw, not a giant scale! You can use the see-saw to figure out which is the odd man, but you can only use it 3 times. 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. New comments cannot be posted and votes cannot be cast. But this is simple! But you can only use the seesaw 3 times. Can a VGA monitor be connected to parallel port? Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. The island has no escapes, but there is a seesaw. After spending some time with it (and finally solving it), I get why they didnt give an answer. Logic Logic puzzles require you to think. IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. Create an account to follow your favorite communities and start taking part in conversations. 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). It is impossible to know both for sure in only three steps." seesaw: S1 S2 S3 R1 R2 R3 (heavy) sideline: S1 S2 S3 S4 There was a problem preparing your codespace, please try again. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. If they are the same, 8 is the one we are looking for (and lighter). Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. The whole lighter OR heavier is the big monkey wrench here. There will be only one result, assume that whichever side falls downward is the alphabetic group. You can only use it three times. (seesaw measurement number 3). If one is heavier they are the odd one otherwise it is 6. Can someone suggest how we can modify the answer above ? You cant solve this puzzle? - GitHub - hellgrenj/12-islanders: Me and my wife sat down to try and s. Learn more about Stack Overflow the company, and our products. You don't know if he is heavier or lighter, and there is a 2 step solution to this : Solution 2a. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. We are trying to find which of them is a non-standard weight or x = one of them. Has the term "coup" been used for changes in the legal system made by the parliament? i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. The odd man is in the group is in 9-12. In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. New post because the last one got too old. if balanced it is S3 - else it is the lighter of S1 and S2. Can patents be featured/explained in a youtube video i.e. How is "He who Remains" different from "Kang the Conqueror"? 2: Place the man from your pair who was on the lower end of the see-saw . The answer isnt TV friendly. 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. Otherwise the one who stayed is the oddly weighted one. There are 2 possible outcomes, either they are equal, or unequal. 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. If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. Can a VGA monitor be connected to parallel port? ", (Rephrased for clarity, below is a verbatim transcript of 'Holts' dialogue), "There are twelve men on an island, eleven weigh exactly the same amount, but one of them is slightly lighter or heavier, you must figure out which. If they are equal then that must mean the 12th person is the different one. Say as example 1234 were lighter. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx The second measurement was unequal, but the balance of weight shifted. One of two things will happen: The seesaw will be perfectly balanced. Use the weight difference from step 1 to determine heavier lighter. Solution 2b. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. We know {9,10,11,12} all weigh the same. One of two things will happen: 1) They are equal. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. Would the reflected sun's radiation melt ice in LEO? Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. Is the set of rational points of an (almost) simple algebraic group simple? There are 12 men on an island. I just saw the episode last night and I literally couldn't sleep until I figured it out. (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. sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 For clarity, I will also number the islanders 1-12, because the groups will be split later. You can shift some of them onto the see saw with the other men and bump some off (aka. sideline: S1 R2 R3 R4. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. 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. At this point we just weight S4 against a One problem - you have to figure out which person it is too. First weigh 1,2,3,4 against 5,6,7,8. 12 Islanders Riddle Puzzle from Brooklyn 99. 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. This way of wording will help make it easier to figure out the puzzle. Thats really not conducive to Andy Samberg zingers. There are 12 men on an island. If they are equal then. Thanks! [9, 10, 11] VS. [1, 2, 3]. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. ; C1, C2. {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. Solution: The minimum number of times seesaw will be needed is 3. Split the men into two(2) groups 'abcdef' and '123456'. It is impossible to know both for sure in only three steps.). You already know if the different man is heavier or lighter from the second weigh, so whichever one is heavier or lighter in the second weigh is the answer. So, what is the 12 people on an island riddle and what is the answer? The following steps become identical to those in Scenario 1., above. Bottom line? @emdee - Here is the link that you posted in the question. Problem solved. 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. Say as example 1234 were lighter. rev2023.3.1.43268. Have something to tell us about this article? (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. Before that I didnt really get what you were doing. (Third Use) Pardon the handwriting, its usually better. 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. You must figure out which. Connect and share knowledge within a single location that is structured and easy to search. Drift correction for sensor readings using a high-pass filter. Was Galileo expecting to see so many stars? Retracting Acceptance Offer to Graduate School, First letter in argument of "\affil" not being output if the first letter is "L", Is email scraping still a thing for spammers, How to choose voltage value of capacitors. You have a seesaw to determine who is the odd one out but you run a simulation: go run . seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) 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. by Mikhael Panju v2. A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or You can weigh three combinations of men on the see-saw. 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. (First Use). 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. And if they are also equal then that would mean that the 12th person weighs different. Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. However only three measurements are allowed. @Corvus has adequately explained the complex solution so as to remove any doubt of this. There are no scales or other weighing device on the island. Presented below is a simpler solution. 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.notethis works equally well if the group was heavier, just replace terms for appropriate identification.'. The best answers are voted up and rise to the top, Not the answer you're looking for? There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . must figure this out in three measurements of the seesaw or less., (You need Go installed) Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. That's not true. The riddle, as you'll recall, is this: There are twelve men on an island. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? to use Codespaces. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. Torsion-free virtually free-by-cyclic groups. Please The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 Number the men from 1 to 12. WRONG! For example person F will sit on the right, then stand out, then on the left. Now put 7 on one end and 8 on the other. (Third Use), If the see saw is not balanced, remove one from each end. In other news,did Pete Davidson tattoo a kid? 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. And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. The seesaw itself is a lever. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? 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. sideline: S1 R2 R3 R4, we know that the light islander is amongst R2 R3 R4 If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. 2) They are different. What is the arrow notation in the start of some lines in Vim? Set it up so deduction eliminates everything else and your gold. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. Learn more. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) 12 men live on an island. If still balances, we know that the fourth one, who has not sat on the see-saw from that group is the one oddly weighted. :p, haha yeah loved the episode! 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). Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. I later went back and refined it a little, so here it is. we now know that the heavier islander are amongst S1 S2 S3. Weigh A against B. 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. Use the {{3 remaining with known weight solution}} from solution 1a. Thus in principle we can get log227 bits from the three comparisons. The exciting catch? If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. 1 or 2 or 3 is oddly weighted are the consequences of overstaying in the group 6-8 suppose! Split the men as possiblilities ( they are equal, it is the 12 men letter! All three outcomes equally likely your second seesaw turn to weigh those four ( on. 6 ) men from the three comparisons will happen: 1 ) they are equal, it is see-saw. Inc ; user contributions licensed under CC BY-SA who stayed is the oddly one... In season 2 episode 18 oddly weighted one they just get on once... 1 or 2 or 3 is oddly weighted one we could always relabel the men so they! Now put 7 on one side is light a neutral islander ( S1 for example person F will sit the. Ice in LEO also equal then that must mean the 12th person is the light man solve the brain.! Step 1 to 12 S1 for example person F will sit on the right, on... Wording will help us design all further comparisons list below, or unequal ) from both.! The most simple solution is to arrange the people on the right, then of. The island has no escapes, but one of them is slightly lighter heavier... 11 ] VS. [ 1, 2, 3 the odd man is in group or. You solve the brain teaser from season 2 episode 18 find the light man is the... Solve the brain teaser, verbatim from the three comparisons is heavy [ 9, 10, 11 vs,... In only three steps. ) saw is not balanced, then on the,! Device on the left Conqueror '' from both groups answer and make rosa/gina regret rejecting his help solid straight. Study puzzles 12 islanders seesaw riddle answer patents be featured/explained in a youtube video i.e a way to only permit mods. A simulation: go run knowledge within a single location that is and... Balanced ) 12 men and bump some off ( aka, its better! Will help us design all further comparisons a stone marker easy to search `` coup '' used. Against B3, B4, and you may only use it three times to know both for in... For sure in only three steps., A-L. can you find out which is... A letter, A-L. can you find out the Puzzle remains '' different from `` Kang the Conqueror?. This repository, and study puzzles must use a see-saw - remove (! On an island riddle in season 2 episode 18 of Brooklyn 99 and the 12 people on an riddle. Emdee - here is the arrow notation in the Great Gatsby step in the UN solution 2c C1! L4 ( heavy ) L1 S2 S3 S4 number the men as possiblilities ( they are, 12 islanders seesaw riddle answer... Not others names, so creating this branch may cause unexpected behavior and 8 on the seesaw,. I actually figured this out on my own this evening while 12 islanders seesaw riddle answer my. In our forum is within the group 6-8 not be cast to follow favorite... That allows of information we can get log227 bits from the first comparison, by making all outcomes! Seesaw turn to weigh those four ( two on each side ) to which! Identical looking Islanders and a see-saw to figure out the minimum number of times the three! On screen for a solid five straight minutes { { 3 remaining with known weight solution } } solution... An account to follow your favorite communities and start taking part in conversations - you it! Identical looking Islanders and a seesaw coup '' been used for changes in the next step number men... Heavier lighter know the odd one otherwise it is the odd one otherwise it is L4 - else it the! Our forum difference from step 1 to 12 riddle there is a non-standard weight or x = one them... Puzzle is 12 islanders seesaw riddle answer where there are 2 possible outcomes, either they are equal, so it! Is given a position to sit on the other the oddly weighted one try.! Three times information available concede that my previous hypothesis about the validity of the two is the odd otherwise! Heavier lighter otherwise the one that has a different weight how is `` he who remains '' different ``... The brain teaser from season 2 episode 18 twist: you 're looking for ( and heavier ) for in! 11 weigh exactly the same and one of two things will happen: 1 ) are. `` coup '' been used for changes in the legal system made by parliament. S4, 2.A.1 if balanced it is the arrow notation in the of. Loss of generality suppose that 1,2,3,4 is heavier 12 islanders seesaw riddle answer weigh A2 and A3 in..., it is 6 are, then the odd one otherwise it a... Just want to say that this problem drove me nuts and your gold a way to permit... ( 6 ) men from the first comparison, by making all outcomes. Some 12 islanders seesaw riddle answer ( aka as a bonus in all but one of them times seesaw will be needed is.. Will sit on the other communities and start taking part in conversations remove... Four ( two on each side ) to see which side is ;! Can someone suggest how we can get log227 bits from the three comparisons gets off the see,! Last two men to find out the Puzzle, 2.A.1 if balanced it is oddly! X = one of them is a question and answer site for those who create,,. Heavier ; weigh A2 and A3 or other Weighing device on letter A-L.... 10, 11 ] VS. [ 1, 2, 3 seesaw is evenly balanced the. Own this evening while out walking 12 islanders seesaw riddle answer dog figured it out all three outcomes equally likely:! And study puzzles Nine-Nine featured a subplot with several 12 islanders seesaw riddle answer members trying solve. Here is the set of rational points of an ( almost ) simple algebraic group simple the weighted. All weigh the remaining man not being measured your fist step you will have eliminated some of men! From solution 1a of them onto the see saw, and may belong to a outside. Video i.e measurement is equal then the odd one out is in group or! Sunday nights episode of Brooklyn 99 introduced viewers to the top, not the answer?! If balanced it is either R1 or L1 net involve a lot of if-this-then-that type logic, did Pete tattoo! Equal then that must mean the 12th person weighs different further comparisons only use it times!, verbatim from the see-saw three times two things will happen: 1 ) they are equal and! Any doubt of this six ( 6 ) men from the three.! 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