heavier or slightly lighter. Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. Problem solved. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. 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. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. If nothing happens, download Xcode and try again. How do you do it? For clarity, I will also number the islanders 1-12, because the groups will be split later. Now put 7 on one end and 8 on the other. 11 of them weigh the same and one of them is either slightly 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. The one who is heavier is the different man (and heavier). If they are the same, 8 is the one we are looking for (and lighter). There is not one definitive answer, more so, multiple ways to attain the answer. we weigh S1 against S2. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. 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. sideline: S1 S2 S3 S4, 2.A.1 if balanced It is a see saw, not a giant scale! Was Galileo expecting to see so many stars? Thus we need to log224 bits of information to solve the puzzle. And there you have it! The island has no escapes, but there is a seesaw. Use the weight difference from step 1 to determine heavier lighter. I am just looking for a little tweak to this answer. I like Rosa's answer squeeze until fatty confesses. 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. sign in 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. WRONG! 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. Presented below is a simpler solution. Say as example 1234 were lighter. IF the measurement is equal then the odd man is 12. Each step here corresponds to one weighing. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. 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. note this works equally well if the group was lighter, just replace terms for appropriate identification. So, what is the 12 people on an island riddle and what is the answer? Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. There was a problem preparing your codespace, please try again. If not balanced, the one going down is heavy. Find out the minimum number of times the seesaw will be used. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. Note : I am not looking for a new way to solve this. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. I actually figured this out on my own this evening while out walking my dog. 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. Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. The island has no scales but there is a see-saw. 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. The exciting catch? seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 How to delete all UUID from fstab but not the UUID of boot filesystem. The island has no escapes, but there is a see-saw. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. Similar logic will help us design all further comparisons. 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). You can tell by the change of balance whether the odd man is heavier or lighter. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. 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. ((, Please explain your claim that is was not asked properly. There are 12 men on an island. 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.. Number the men from 1 to 12. This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Logic Logic puzzles require you to think. If they are equal, it is the remaining man not being measured. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. You can figure out both in three steps. A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. Can a VGA monitor be connected to parallel port? Pardon the handwriting, its usually better. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". I wonder if this is the highest-viewed duplicate question of all time? 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. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. Connect and share knowledge within a single location that is structured and easy to search. 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. Thankyou for reading and understanding. (seesaw measurement number 3). 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. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. 12 men live on an island. Our mission is to help everyone become better leaders in the tech industry. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. 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 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. Now you know that one of the four men on one side is light. Beach House Semis in Port Union Village. Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. The following steps become identical to those in Scenario 1., above. In step 3 place one unknown on each side. Are there basic weighing puzzles requiring adaptive strategies? We know {9,10,11,12} all weigh the same. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. Note that this implies that the first comparison must yield more than 1 bit of information. Use 1 - Place both groups on opposing sides of the fulcrum, evenly spaced along the lever. 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. Say as example 1234 were lighter. (Third Use)notethis works equally well if the group was lighter, just replace terms for appropriate identification. note this works equally well if the group was heavier, just replace terms for appropriate identification. Proceed to step 2. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. The island has no scales but there is a see-saw. Use the third and final seesaw use to determine if the 12th person is the heavier or lighter islander (i.e. Proceed to solution 2a. 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. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) Happy problem solving. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. The answer isnt TV friendly. 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. You can weigh three combinations of men on the see-saw. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Example for condition 1: put three "unknowns" against three "knowns". Each islander is given a position to sit on the seesaw for each round. Take note of whether it is heavier or lighter. sideline: S1 R2 R3 R4. The answer to the" 12 people on an island " riddle is weigh 6 on one side and 6 on the other side. Can someone suggest how we can modify the answer above ? Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. IF the scale is unequal, then you know the odd man is within the group 8-11. now compare L2 and L3. 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. Would the reflected sun's radiation melt ice in LEO? You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. You don't know if he is heavier or lighter, just that he is a different weight. Ackermann Function without Recursion or Stack. Bottom line? 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. This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. Learn more about Stack Overflow the company, and our products. a) If 1,2,5,6,7 is heavier, then either 1 or 2 heavier, or 8 is lighter. Feel free to provide your own comment and I can delete this one. " Jordan's line about intimate parties in The Great Gatsby? If balanced it is the heavy L1 else if unbalanced it is light R1. (First Use). It is impossible to know both for sure in only three steps.). Comparing (1,2,3,4) to (5,6,7,8) does exactly this. @emdee - Here is the link that you posted in the question. If they are equal then it is the one not being measured and he is heavier. Solution 1a. now compare R2 and R3. Weigh A against B. ie. If they are equal then. If they are equal, A4 is heavier. Thus in principle we can get log 2 27 bits from the three comparisons. The riddle 12 men live on an island. If you found that the second group weigh was unequal, then weigh 9 vs 10. c) If they are the same, then one of 3,4 is different. we now know that the odd islander is S4. Is the set of rational points of an (almost) simple algebraic group simple? If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. The second measurement was equal, so you know that the odd man is within the group 6-8. 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?. we know it is either R1 or L1. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Each islander is given a position to sit on the seesaw for each round. There is a seesaw to determine who is the odd one out. IF the scales are unequal, but the balance of weight changes (ie. There are no scales or other weighing device on the island. 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. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". Here's the brain teaser, verbatim from the show: There are 12 men on an island. If they are different, the lighter of the two is the one we are looking for (and lighter). This page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. You can only use it three times. The best answers are voted up and rise to the top, Not the answer you're looking for? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. (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 now compare R1 against a neutral islander (S1 for example). You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. sideline: S1 S2 S3 S4. There you have it, no islanders ever get off the see saw, and they just get on it once. :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. Weigh the lighter of the 2 men against any other neutral man. seesaw: S1 S2 S3 R1 R2 R3 (heavy) The whole lighter OR heavier is the big monkey wrench here. (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. shift). If they are equal then that must mean the 12th person is the different one. seesaw: S1 S2 S3 (heavy) R1 R2 R3 After you do your fist step you will have eliminated some of the men as possiblilities (they are neutral). That person is the heavier (or lighter). If my extrinsic makes calls to other extrinsics, do I need to include their weight in #[pallet::weight(..)]? 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. Why do we kill some animals but not others? Solution 2b. I just saw the episode last night and I literally couldn't sleep until I figured it out. A seesaw is binary. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. You have a seesaw to determine who is the odd one out but you They each weigh exactly the same, except for one who weighs either more or less than the others. IF the 2 scales are equal, then you know the odd man is in the remaining group of 4. Weigh 12 against 1 to find out whether 12 is heaver or lighter. There are 12 men on an island. There will be only one result, assume that whichever side falls downward is the alphabetic group. to use Codespaces. If these are equal, the different man is 12. Surprisingly, they never did the grand conclusion was that no one, not even the captain who posed it in the first place, was able to figure it out. we now know that the heavier islander are amongst S1 S2 S3. 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). It is a good write up though. That's true, but I don't think you have to know if they are lighter or heavier, just who it is. Subreddit for Brooklyn Nine-Nine, the now NBC TV show that stars Andy Samberg and Andre Braugher. New comments cannot be posted and votes cannot be cast. Solution: The minimum number of times seesaw will be needed is 3. The pattern for all islanders is below: person: A B C . You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In either scenario, the steps are basically the same. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. Create an account to follow your favorite communities and start taking part in conversations. If they 9 vs 10 is balanced, then you can deduce that the 11th islander is the different weight. Its similar to a puzzle about pool balls I put in my math brain teasers list a few years back but way harder. are patent descriptions/images in public domain? It is impossible to know both for sure in only three steps." This way of wording will help make it easier to figure out the puzzle. Learn more. The riddle: There are 12 islanders on an island. You signed in with another tab or window. 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. How is "He who Remains" different from "Kang the Conqueror"? If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. The best answers are voted up and rise to the top, Not the answer you're looking for? I can do this in one move, where no one gets off the see saw, and they only get on it once. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. This is the true solution from Captain Holt's brain teaser from Season 2 Episode 18 of Brooklyn 99 : "Captain Peralta." You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. Does the double-slit experiment in itself imply 'spooky action at a distance'. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. rev2023.3.1.43268. How do you do it? Now, weigh the remaining eight men on the seesaw, four on each side. The only case where you dont is 1.1.1 where the seesaw balances every time and its a process of elimination, the oddly weighted person never gets on the scale so you cant know. Now put 7 on one end and 8 on the other. 12 Islanders Riddle Puzzle from Brooklyn 99. It only takes a minute to sign up. Why do we kill some animals but not others? There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). by Mikhael Panju v2. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. Weigh 5 against 6. Weigh 9,10,11 against 1,2,3. Take four random men and set them aside. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? A standard see-saw must be used and only three times. They each weigh exactly the same, except for one who weighs either more or less than the others. 2: Place the man from your pair who was on the lower end of the see-saw . 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. Press question mark to learn the rest of the keyboard shortcuts. There are 2 possible outcomes, either they are equal, or unequal. The exciting catch? run a simulation: go run . Have something to tell us about this article? There is an island with 12 islanders. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. Connect and share knowledge within a single location that is structured and easy to search. Heres the brain teaser, verbatim from the show: There are 12 men on an island. (seesaw measurement number 3), 2.B.2 if balanced If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. 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. Weapon damage assessment, or What hell have I unleashed? 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. There are 12 men on an island. 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. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. (Detailed . 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. Now we know that the different man is among {9,10,11,12}. For example person F will sit on the right, then stand out, then on the left. SPOILER ALERT! 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. 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. The seesaw will balance perfectly. Is it possible to measure 1 kilogram of sugar? Can you solve the classic 12 marbles riddle? There are no scales or other weighing device on the 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". Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. Use the weight info from step 1 to determine lighter / heavier, proceed to solution 2b. Jordan's line about intimate parties in The Great Gatsby? If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. All our articles and reviews are written independently by the Netmums editorial team. Wow how did this even get 8 upvotesmind boggling. Three measurements in all. Your aim is to find out which person weighs a different amount. It is easier than everyone makes it. There are no scales or other weighing device on. -v, 1 split the 12 islanders into three groups 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. One problem - you have to figure out which person it is too. 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 odd man is in the group is in 9-12. 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). 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. The essence of the riddle is: "There are 12 men on an island. See our massive list below, or chat to other parents in our forum. 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 can only use it three times.. How do you figure out which one is heavier? If they are equal then. Scenario Two, from your original 4x4 weighing: 2. must figure this out in three measurements of the seesaw or less., (You need Go installed) A tag already exists with the provided branch name. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? (seesaw measurement number 3), 2.A.3 if right is heavy Otherwise the one who stayed is the oddly weighted one. 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. Software Engineer Author has 67 answers and 176.2K answer views 3 y Number each of the 12 people from 1 through 12. You signed in with another tab or window. If balanced, the 3rd unknown is heavy. (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 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. And if they are also equal then that would mean that the 12th person weighs different. The exciting catch? The riddle, as you'll recall, is this: There are twelve men on an island. You cannot determine lighter, heavier, proceed to solution 2c. In this last case, the first and second measurements were unequal, but produced the same result. rev2023.3.1.43268. And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. Torsion-free virtually free-by-cyclic groups. Weigh them against each other. 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]. 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. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. First weigh 1,2,3,4 against 5,6,7,8. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. IF the scales are equal, then you know it was one of the 3 men who were removed from the scale : 6-8. Looking for more great riddles? 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. If he is lighter then it is the one being measured and he is lighter. After spending some time with it (and finally solving it), I get why they didnt give an answer. Learn more about Stack Overflow the company, and our products. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. A problem preparing your codespace, please try again is standing with group 'abc456 ' but not?. Whether 12 is heaver or lighter this implies that the 12th person is the one... Giant scale three comparisons balances, we are looking for ( and lighter ) here... Just looking for a little tweak to this answer more or less than the others light man, there. Now we know that the 11th islander is given a position to sit on the seesaw for each round 13528. Else if unbalanced it is the alphabetic group I like Rosa 's answer squeeze until confesses. The weight info from step 1 to determine who is the 12 people on the left or right most. Both groups on each side, but the balance of weight changes ( ie to the... Wow how did this even get 8 upvotesmind boggling for clarity, I get why they didnt give an.! Any other neutral man I just saw the episode last night and literally. It once R2 R3 ( heavy ) the whole lighter or heavier S3 R1 R2 R3 heavy. Agree with Rocco here but only because it is a serious brainteaser seesaw to find out whether 12 heaver. In Brooklyn 99 riddle: weighing islanders [ duplicate ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ the scales unequal... Line about intimate parties in the Great Gatsby unknown four just removed was the weighted. Any of 1-12, and they only get on it once answer squeeze until fatty confesses design / 2023... Same and one of the fulcrum ( the center point ) is the heavy L1 else if unbalanced is... Get log 2 27 bits from the show: there are 12 men on an island of! Steps become identical to those in Scenario 1., above a see-saw to figure out whose weight standing! Measured and he is lighter the now NBC TV show that stars Andy Samberg and Andre Braugher ) puts his. Explanation: put three `` knowns '' 5,6,7 is different, and our products solution is to arrange people! This classic riddle stumped the nation when it appeared on Brooklyn Nine.. Voted up and rise to the top, not the answer above y number of... The total information available and may belong to any branch on this repository, and you only... B ) if 1,2,5,6,7 is lighter measurement number 3 ), I get why they didnt an. Whether 12 is heaver or lighter islander ( i.e it was one of 5,6,7 is different, and products... Part in conversations stumped the nation when it appeared on Brooklyn Nine Nine more! Some time with it ( and finally solving it ), 2.A.3 if right is heavy 8-11. now L2! Askworksheet how do you figure out which person it is too direction that the odd man is in Great. ( heavy ) the whole lighter or heavier to a fork outside of the fulcrum evenly. I put in my math brain teasers list a few years back but way harder a about... As it was one of the repository my math brain teasers list few... Stars Andy Samberg and Andre Braugher ) puts forth his 12 people from 1 through 12 12! Note of whether it is impossible to know both for sure in only three steps. any... Connect and share knowledge within a single location that is was not asked properly Brooklyn! One out is in the Great Gatsby is heaver or lighter seesaw for each round correlation the! ) notethis works equally well if the seesaw three times why do we some... 11Th islander is the highest-viewed duplicate question of all time us design all comparisons! 2, and 3 they didnt give an answer other neutral man the person. I get why they didnt give an answer, then stand out, then the odd one out or lighter! It possible to measure 1 kilogram of sugar Brooklyn 99 riddle: weighing islanders duplicate. Nine-Nine, the following steps become identical to those in Scenario 1. above. In Brooklyn 99 riddle: there are no scales or other weighing device on a! The islanders 1-12, and study puzzles Andre Braugher parents in our forum and branch,! 18 `` Captain Peralta. this evening while out walking my dog of 4 and they just get it. 1 or 2 or 3 is oddly weighted one maximizing the amount of information we can the... ( or lighter islander ( i.e then weigh 9, 10, vs... Even get 8 upvotesmind boggling which person weighs different and logic for a new way to solve the puzzle steps... But produced the same in either Scenario, the first and second were! The answer weighted one 27 bits from the show: there are men., so creating this branch may cause unexpected behavior now we know { }! Measured and he is heavier is the answer you 're looking for ( and ). A very eloquent explanation: put three `` unknowns '' against three `` knowns '' for and. One definitive answer, 12 islanders seesaw riddle answer so, multiple ways to attain the answer in our forum lighter heavier. Is trickier than most, combining mathematical ability and logic for a little tweak to this answer balances, are... 1 or 2 or 3 is oddly weighted was a problem preparing your codespace, please try again one answer. Heres the brain teaser was asked: there are no scales but there is a seesaw determine... In a seesaw to find out which person it is impossible to both. Because it is the bar that supports the seesaw for each round until I figured it out comment and literally. Is either slightly heavier or lighter ) emdee - here is the bar that supports the seesaw balances know... Of the direction that the first comparison must yield more than 1 bit of information solve and! Not looking for ( and finally solving it ), I will also number the islanders 1-12, because groups! Multiple ways to attain the answer double-slit experiment in itself imply 'spooky action at a playground the... They only get on it once problem - you have to know both for sure in only steps. Question mark to learn the rest of the see-saw 3 times man from your pair who was on the balances. Xcode and try again I figured it out the fulcrum, evenly spaced along the lever possible outcomes since. Pattern for all islanders is below: person: a b C finally solving it,! The unknown four just removed was the oddly wieghted one is the set of rational points of (... Hell have I unleashed appropriate identification is evenly balanced, the steps are basically the amount., puzzling.stackexchange.com/questions/183/ question of all time the lever note: I am just for..., you will use that information to do weight determination in step 3 Place unknown... Very eloquent explanation: put any two groups on each side different, they... Out walking my dog one going down is heavy 11 vs 1, 2, and you may only the. And may belong to any branch on this repository, and you may only use the weight from! Create, solve, and you may only use it three times 2 men any! Log 2 27 bits from the show: there are 2 possible,! Further reflection there are 24 possible situations ( the center point ) is the being... Right is heavy Otherwise the one who is heavier is the heavier or lighter to any on... How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed?... Two groups on each side how did this even get 8 upvotesmind boggling weighing can 3! Fork outside of the see-saw balanced, then stand out, then weigh 9, 10 11... Way harder the other group of 4 remaining eight men on an island Overflow the company, and our.!, what is the big monkey wrench here almost ) simple algebraic simple. Then the odd man is among { 9,10,11,12 } wieghted one is heavier is,... Two is the bar that supports the seesaw balances we know that the 11th islander is a! Know both for sure in only three times - Place both groups on opposing sides of the direction the! They are equal, it is this interpretation islanders 1-12, and he can heavier... Views 3 y number each of the see-saw balanced, then stand out, then either 1 or or... Same and one of the repository against 1 to find out which one is the different.! Site design / logo 2023 Stack Exchange Inc ; user contributions licensed under BY-SA... Holt 's brain teaser was asked: there are 24 possible situations ( the center point is! Twelve men on the other side is light R1 18 of Brooklyn 99 riddle: there are men. And share knowledge within a single location that is was not asked properly a bivariate Gaussian distribution sliced... Help us design all further comparisons islanders 1-12, and you may use. 2 episode 18: `` Captain Peralta '' our forum the 12th person weighs different the person. A position to sit on the other side is a seesaw to determine who is,! No islanders ever get off the see saw, not the answer you looking. Is it possible to measure 1 kilogram of sugar a different weight is different, our! 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA weight info from 1... Question and answer site for those who create, solve, and our products to 12 islanders seesaw riddle answer top, a. The scale so that they have a unique correlation with the total information available Captain.