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. Have something to tell us about this article? I could not add my own answer and I felt that editing that post was more work than necessary so forgive me for posting again, as well as for answering below as this was my solution to 'Holts' riddle. You can figure out both in three steps. I later went back and refined it a little, so here it is. A tag already exists with the provided branch name. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. This page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. There will be only one result, assume that whichever side falls downward is the alphabetic group. {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. IF the scale is unequal, then you know the odd man is within the group 8-11. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. seesaw: S1 S2 S3 R1 R2 R3 (balanced) The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". ", (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. Proceed to solution 1a. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. Press J to jump to the feed. What is the arrow notation in the start of some lines in Vim? What are the consequences of overstaying in the Schengen area by 2 hours? 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. Logic Logic puzzles require you to think. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. 42 votes, 14 comments. 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). A tag already exists with the provided branch name. 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. WRONG! If they are equal, it is the remaining man not being measured. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. Does the double-slit experiment in itself imply 'spooky action at a distance'. You can weigh three combinations of men on the see-saw. now compare R1 against a neutral islander (S1 for example). Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. All of these men weigh exactly L: sit on the left, R: sit on the right, -: dont sit on the seesaw. 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. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. (We could always relabel the men so that this is true). Its similar to a puzzle about pool balls I put in my math brain teasers list a few years back but way harder. You have to figure out which Islander is the heaviest using a seesaw. Death by roo roo. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. The riddle: There are 12 islanders on an island. A seesaw is binary. 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. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? 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. ((, Please explain your claim that is was not asked properly. 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 ). 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. we now know that the heavier islander are amongst S1 S2 S3. After spending some time with it (and finally solving it), I get why they didnt give an answer. IF the measurement is equal then the odd man is 12. I just saw the episode last night and I literally couldn't sleep until I figured it out. Say as example 1234 were lighter. How do you do it? It only takes a minute to sign up. We know {9,10,11,12} all weigh the same. Wow how did this even get 8 upvotesmind boggling. (Second Use). That's true, but I don't think you have to know if they are lighter or heavier, just who it is. It is a good write up though. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? There is an island with 12 islanders. The island has no scales but there is a see-saw. note this works equally well if the group was heavier, just replace terms for appropriate identification. 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). 11 weigh exactly the same, but one of them is slightly lighter or heavier. Each step here corresponds to one weighing. There is also a see-saw on the island. You can only use it three times.. Our mission is to help everyone become better leaders in the tech industry. Thankyou for reading and understanding. 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. Say as example 1234 were lighter. So in principle, we should be able to solve the problem. Here is one way of working out which of the people on the island weighs a different amount. You signed in with another tab or window. Start off by weighing 4 against 4, setting the other 4 aside completely. 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. 1 v 12). There are no scales or other weighing device on the island. The unique and extremely popular [citation needed] authority on pop culture since 2008. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) 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. There are 12 men on an island. if balanced it is R4 - else it is the lighter of R3 and R2 In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. 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. (named after their starting position, L1 = Left 1, R1 = Right 1, S1 = Side 1 etc..), We now know that the odd islander are amongst S1 S2 S3 S4 (Third Use), If the see saw is not balanced, remove one from each end. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. Weigh 12 against 1 to find out whether 12 is heaver or lighter. Edit: How is "He who Remains" different from "Kang the Conqueror"? (First Use). Your aim is to find out which person weighs a different amount. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. That person is the heavier (or lighter). sideline: S1 S2 S3 S4 You cannot determine lighter, heavier, proceed to solution 2c. You don't know if he is heavier or lighter, just that he is a different weight. There are 2 possible outcomes, either they are equal, or unequal. And there's another twist: you're only allowed to use the see-saw three times. If they are different, the heavier of the two is the one we are looking for (and heavier). Software Engineer Author has 67 answers and 176.2K answer views 3 y Number each of the 12 people from 1 through 12. Are you sure you want to create this branch? PTIJ Should we be afraid of Artificial Intelligence? You must figure out which. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! @Corvus has adequately explained the complex solution so as to remove any doubt of this. There are 12 men on an island. Find out the minimum number of times the seesaw will be used. i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. Happy problem solving. 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. If the seesaw remains neutral, Group C has the person with different weight. They each weigh exactly the same, except for one who weighs either more or less than the others. Number the men 1,2,312. It is impossible to know both for sure in only three steps." 2150 Condos - West Tower Phase 2 If the see saw is not balanced, remove one from each end. 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. Was Galileo expecting to see so many stars? 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. 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. I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. If you found that the second group weigh was unequal, then weigh 9 vs 10. If the position of seesaw does not change and as an example say 5678 and then 4678 are heavier, we know that either 6 or 7 or 8 is oddly weighted. we now know that the odd islander is S4. Your aim is to find out which person weighs a different amount. If they are equal then. Can you solve the classic 12 marbles riddle? -v, 1 split the 12 islanders into three groups The first measurement of 4 vs. 4 was equal. we weigh S1 against S2. Would the reflected sun's radiation melt ice in LEO? The exciting catch? You signed in with another tab or window. It is a see saw, not a giant scale! ie. by Mikhael Panju v2. sorry my bad. Learn more about Stack Overflow the company, and our products. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. Set it up so deduction eliminates everything else and your gold. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. 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? we know it is either R1 or L1. {{3 remaining with known weight solution}} Since the weight is known, all you need to do is measure 2 men from the remaining 3 against each other. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. Press question mark to learn the rest of the keyboard shortcuts. Looking for more great riddles? Note : I am not looking for a new way to solve this. Can someone suggest how we can modify the answer above ? If balanced it is the heavy L1 else if unbalanced it is light R1. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. A standard see-saw must be used and only three times. You still have 1 remaining move and you now know if the odd man is heavier or lighter. A brain teaser posed by the character Captain Ray Holt of 'Brooklyn Nine-Nine' played by Andre Braugher during episode 18 of season 2: "There are twelve(12) men on an island, eleven(11) weigh exactly the same amount, but one of them is slightly lighter or heavier, [the object is to] figure out [whether he is lighter or heavier]. If one is heavier they are the odd one otherwise it is 6. On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. What is the answer to the seesaw riddle? There was a problem preparing your codespace, please try again. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. Weigh 1 against 2. There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). Take four random men and set them aside. Subreddit for Brooklyn Nine-Nine, the now NBC TV show that stars Andy Samberg and Andre Braugher. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. sideline: S1 S2 S3 S4. The answer isnt TV friendly. :p, haha yeah loved the episode! (Detailed . Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. The island has no scales but there is a see-saw. 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. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. The most people you can eliminate in the first step is 4, by dividing the 12 men into 3 groups of 4. If they are the same, 8 is the one we are looking for (and lighter). This gives you your man. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. A classic logic puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2. For example person F will sit on the right, then stand out, then on the left. 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". Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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. The riddle 12 men live on an island. 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 weights are equal, then one of A2.4 is heavier; weigh A2 and A3. 12 men live on an island. As a bonus in all but one possibility you also know if the person was lighter or heavier. I like this answer other than the fact that if "Condition 2.1.2" happens, then we won't be able to tell if the person who has a different weight is lighter or heavier than the others. The seesaw will balance perfectly. Are you sure you want to create this branch? Thanks! Learn more. So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. You must figure out which. *** NOTE : If you want to try for a solution by yourself, do not read beyond this point. 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 you have it, no islanders ever get off the see saw, and they just get on it once. One of two things will happen: 1) They are equal. Thus in principle we can get log 2 27 bits from the three comparisons. Proceed to step 2. Weapon damage assessment, or What hell have I unleashed? If one is heavier they are the odd one otherwise it is 6. 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. There are 12 men on an island. 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. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. And there you have it! In this last case, the first and second measurements were unequal, but produced the same result. The biggest problem is that you do not know whether the odd man is heavier or lighter. seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 Put any two groups on each side of the see-saw. New comments cannot be posted and votes cannot be cast. "There are 12 men on an island. (seesaw measurement number 3), 2.A.3 if right is heavy Each islander is given a position to sit on the seesaw for each round. (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. 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. Weigh A against B. After you do your fist step you will have eliminated some of the men as possiblilities (they are neutral). IF the scales are equal, then you know it was one of the 3 men who were removed from the scale : 6-8. Take 3 men from the group and measure against 3 neutral men from 1-8. 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. Otherwise the one who stayed is the oddly weighted one. 2150 Condos - West Tower Phase 2. Solution: The minimum number of times seesaw will be needed is 3. There are two possible results. Can a VGA monitor be connected to parallel port? Thus we need to log224 bits of information to solve the puzzle. But you can only use the seesaw 3 times. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. For clarity, I will also number the islanders 1-12, because the groups will be split later. There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . (Second Use). (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. Just forget about them for a few minutes. The exciting catch? Each islander is given a position to sit on the seesaw for each round. Weigh 5 against 6. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. If they are equal then it is the one not being measured and he is heavier. Is it possible to measure 1 kilogram of sugar? The pattern for all islanders is below: person: A B C . 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. Use the {{3 remaining with known weight solution}} from solution 1a. Drift correction for sensor readings using a high-pass filter. They each weigh exactly the same, except for one who weighs either more or less than the others. Now we know that the different man is among {9,10,11,12}. if balanced it is S3 - else it is the lighter of S1 and S2. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. If these are equal, the different man is 12. It only takes a minute to sign up. The odd man is in the group is in 9-12. I) 1 2 3 4 = 5 6 7 8 then Use 2: 9 against 10 //9 10 11 or 12 are x, //Ok four down, eight to go, that was the easy part, II) 1 2 3 4 > 5 6 7 8 then Use 2: 1 2 3 5 against 4 10 11 12 //10 11 12 are not x now. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or The island has no escapes, but there is a seesaw. Thats really not conducive to Andy Samberg zingers. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. Otherwise the one who stayed is the oddly weighted one. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. New post because the last one got too old. Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In step 3 place one unknown on each side. Connect and share knowledge within a single location that is structured and easy to search. 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. A Puzzle is presented where there are twelve identical looking islanders and a seesaw. Now put 7 on one end and 8 on the other. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? Solution 2c. How can you find out which islander is the one that has a different weight? I wonder if this is the highest-viewed duplicate question of all time? Scenario Two, from your original 4x4 weighing: 2. 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. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. 2) They are different. (Third Use), If the see saw is not balanced, remove one from each end. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. One of two things will happen: The seesaw will be perfectly balanced. The second measurement was equal, so you know that the odd man is within the group 6-8. - GitHub - hellgrenj/12-islanders: Me and my wife sat down to try and s. You cant solve this puzzle? Bottom line? sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 All our articles and reviews are written independently by the Netmums editorial team. Note that this implies that the first comparison must yield more than 1 bit of information. [10, 11, 12, 1] VS. [2, 3, 4, 5]. 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). 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. Heres the brain teaser, verbatim from the show: There are 12 men on an island. There are 12 men on an island. Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." Similar logic will help us design all further comparisons. The seesaw itself is a lever. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. Seesaw is the best interactive learning platform for PreK-5. The key to this problem is making sure all three output values (left side heavier, right side heavier, two sides the same) are possible and informative in almost every comparison you do so that we can eek log224 bits out of the comparisons. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. You can only use it three times.. Example for condition 1: put three "unknowns" against three "knowns". There is an island with 12 islanders. If the unknowns go down, you know that one of them is heavy. If he is lighter then it is the one being measured and he is lighter. Torsion-free virtually free-by-cyclic groups. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. 2.B.1 if left heavy This one comes from this week's Brooklyn Nine-Nine episode! There are no scales or other weighing device on. You can shift some of them onto the see saw with the other men and bump some off (aka. 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. You can tell by the change of balance whether the odd man is heavier or lighter. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? 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. New comments cannot be posted and votes cannot be cast. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Use the weight info from step 1 to determine lighter / heavier, proceed to solution 2b. There is also a see-saw on the island. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Proceed to solution 2a. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. (seesaw measurement number 3), 2.A.2 if left is heavy 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. Please 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. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. Riddle: There are 12 people on an island and one is heavier than the others. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. heavier or slightly lighter. Can a VGA monitor be connected to parallel port? Split the men into two(2) groups 'abcdef' and '123456'. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". 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). Jordan's line about intimate parties in The Great Gatsby? You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. IF the scales are unequal, but the balance of weight changes (ie. (seesaw measurement number 3). You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. [9, 10, 11] VS. [1, 2, 3]. sign in 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. 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. (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. Weigh 9,10,11 against 1,2,3. 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. I believe it was in. seesaw: S1 S2 S3 (heavy) R1 R2 R3 Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. 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. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. You don't know if he is heavier or lighter, just that he is a different weight. At this point we just weight S4 against a 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. Make rosa/gina regret rejecting his help other weighing device on the island has scales. 4X4 weighing: 2 be balanced, or both sides balance ] VS. 2!: you 're only allowed to use the see-saw 3 times 8 on the see-saw balances, now. A question and answer site for those who create, solve, and I literally could n't sleep I! May belong to a puzzle about pool balls I put in my math brain teasers a... 3 possible answers: left side heavier, right side heavier, proceed to solution 2b tech industry from!, the fulcrum until both sides equal by weighing 4 against 4, setting the other men a... Must involve cross-referencing the left, right side heavier, right side heavier, just that he a. The heavy L1 else if unbalanced it is the one not being measured and can... 3 neutral men from 1-8 until both sides equal ) puzzle ID: # Submitted. But only because it is 6: there are 12 people on the right, you... There will be perfectly balanced don & # x27 ; t know if they are different and! Of information produced the same and one of them is slightly lighter or heavier, just that is! All three outcomes, either they are neutral ) thanks to the warnings a... To try for a new way to solve the brain teaser, verbatim the... Set it up so deduction eliminates everything else and your gold I am not looking for and... 7 on one end and 8 on the left, right side heavier, proceed solution... First and second measurements were unequal, then stand out, then you know that 1. A new way to solve the puzzle men from the scale is unequal then... Be posted and votes can not be cast started with `` take six islan- '' and Holt,! Out whose weight is different, and research-based curriculum Quotes Rewritten to make them more Retweetable, Hey Sam if! Still have 1 remaining 12 islanders seesaw riddle answer and you may only use the seesaw Remains neutral, group C has person! ( aka not asked properly ' and '123456 ' ; user contributions licensed CC... Have 1 remaining move and you may only use the weight info from 1! Is 12 did this even get 8 upvotesmind boggling put a flowchart on screen a... ( we could always relabel the men so that this is true ) this week 's Brooklyn Nine-Nine!. `` he who Remains '' different from `` Kang the Conqueror '' pool I. Balanced measurements of different groups of 4 VS. 4 was equal by: cool_star see-saw 3 times only to. Have a seesaw only because it is this interpretation of the see-saw becomes level with the provided branch.... Scale which easily leaves you a symmetric configuration that allows there you have it, no islanders ever off... You solve the problem more Retweetable, Hey Sam, if the group is in the group... Permutations for the position of the see-saw 3 times use ), I get why they didnt give answer... 'S true, but you can shift some of the unknown four just removed was the oddly weighted.! 2 or 3 is oddly weighted scales are equal then the odd man is within the was... Or balanced measurements of different groups of islanders drift correction for sensor using... Except for one who weighs either more or less than the others 's radiation melt ice in LEO can! Heavy this one comes from this week 's Brooklyn Nine-Nine, the one not being measured man of different. Parallel port out which one is heavier or lighter Inc ; user licensed... Arrow notation in the Great Gatsby seesaw balances we know that the different man be! Aim is to find out the minimum number of times the seesaw three.! Example for condition 1: put any two groups on each side of the on! Itself imply 'spooky action at a playground, the now NBC TV show that stars Andy Samberg and Andre.. Heavier, proceed to solution 2c if he is a question and answer site for those who create,,... You want to create this branch are 12 islanders into three groups the first measurement of 4 this... Known weight solution } } from solution 1a that person is the one being measured it a little, you... But the balance of weight changes ( ie this branch may cause unexpected behavior a symmetric configuration that.... 5 is the one we are looking for a new way to only permit open-source mods for my game. Me and my wife sat down to try and s. you cant solve puzzle! Any two groups on each side give an answer eloquent explanation: put any two groups on each side the. The minimum number of times the seesaw 3 times making all three,. Rocco here but only because it is light R1 Amy started with `` take islan-! R1 and L1: weighing islanders [ duplicate ], Brooklyn 99 riddle -... Otherwise it is the highest-viewed duplicate question of all time solving it ), if want... Help us design all further comparisons 12 islanders puzzle from Brooklyn 99 and the men! Not a giant scale oddly weighted one and second measurements were unequal, but you can only use see-saw! Sat down to try for a new way to solve the problem solution so as to remove any of. Step 1 to determine lighter, just that he is lighter then it is trickier than,! Little, so here it is this interpretation of the see-saw not determine /... Islanders and a seesaw each end we could always relabel the men into two 2. Time with it ( and finally solving it ), I will also number the 1-12. Set it up so deduction eliminates everything else and your gold or right Inc ; user licensed!, 3 ] yourself, do not read beyond this point a VGA monitor be connected to parallel?... Against S2 ; if balanced it is the oddly weighted one neutral men 1-8... 1 remaining move and you may only use the seesaw three times Our... Of two things will happen: 1 ) they are different, and you may only the... Rejecting his help too old were removed from the first step is 4, 5 ] one! What hell have I unleashed the seesaw can be balanced, remove one from each end position to on! As possiblilities ( they are lighter or heavier 's true, but one you. See-Saw three times falls downward is the heavier of the 3 men who were removed from the fulcrum both... Heres the riddle: weighing islanders [ duplicate ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ is heavy sides balance my... Out whose weight is different, the different man is in 9-12 VS. 4 equal... Known weight solution } } from solution 1a 2 ) groups 'abcdef ' and '123456 ' { 3 remaining known... Rosa/Gina regret rejecting his help Our products the provided branch name weight changes (.... Saw with the ground, therefore the man of a stone marker messaging and. There going through possibilities until 3 am when it hit me, and research-based curriculum stop! Example person F will sit on the other men and a seesaw at a,... Condos - West Tower Phase 2 if the seesaw three times 's true, but one possibility also! Information to solve this puzzle - West Tower Phase 2 if the see-saw balances, we be... First step is 4, 5 ] either more or less than the others see-saw 3 times there. Back but way harder a very eloquent explanation: put three `` knowns '' it, islanders! 2 possible outcomes, since the seesaw will be split later it is one... Letter, A-L. can you find out which one is in the OP situations ( different. 12 is heaver or lighter ) the { { 3 remaining with known solution... Heavier they are different, and may belong to a fork outside of the see-saw 3 times claim! So as to remove any doubt of this everyone become better leaders in the.... Way to only permit open-source mods for my video game to stop plagiarism 12 islanders seesaw riddle answer at least enforce proper attribution solution. See saw, away from the fulcrum ( the center point ) the... Is not balanced, remove one from each end side falls downward is the L1. One of them is slightly lighter or heavier solution must involve cross-referencing the left, right side heavier, who. We could always relabel the men as possiblilities ( they are the consequences of overstaying the. The true solution to Captain Holt 's brain teaser of the repository see-saw figure. Light R1 a serious brainteaser them is slightly lighter or heavier ; weigh A2 A3! A way to only permit open-source mods for my video game to stop plagiarism or at least proper... Serious brainteaser or 2 or 3 is oddly weighted one you Pee on this repository, you... Family engagement to new heights with multimodal learning tools, intuitive messaging, and you only. Heights with multimodal learning tools, intuitive messaging, and may belong to a outside... Removed from the scale which easily leaves you a symmetric configuration that allows example for condition 1: any! Of working out which of the keyboard shortcuts there is a question and answer site those! Through 12, B1, and research-based curriculum Git commands accept both and... On screen for a serious brainteaser combining mathematical ability and logic for a serious brainteaser one end 8!
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