Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? I am just looking for a little tweak to this answer. {{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. You must figure out which. Now put 7 on one end and 8 on the other. I later went back and refined it a little, so here it is. Answer explained - step by step Number the islanders 1 to 12 First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. You must figure out which. Learn more. If the unknowns go down, you know that one of them is heavy. You must figure out which. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. There was a problem preparing your codespace, please try again. It is impossible to know both for sure in only three steps.). They each weigh exactly the same, except for one who weighs either more or less than the others. Weigh the lighter of the 2 men against any other neutral man. Take four random men and set them aside. 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. This is the true solution from Captain Holt's brain teaser from Season 2 Episode 18 of Brooklyn 99 : "Captain Peralta." rev2023.3.1.43268. Are you sure you want to create this branch? In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. if balanced it is S3 - else it is the lighter of S1 and S2. You don't know heavier or lighter, but you still have 1 remaining move. There is also a see-saw on the island. What is the arrow notation in the start of some lines in Vim? Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. 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. the first solution i had for the 99 puzzle was another see saw exploit: Initial state 1-6 against 7-12, but islanders leave the see saw in pairs, ie 1 and 12 get off at the same time 2 and 11 after, when your bad penny exits, you'll know its one of that pair as the remaining islanders will balance Theyre the 'bad pair from . IF the scales are still unequal but remain the same, then you know it was 1 of the 2 men who did not change sides, number 1 or 5. You can weigh three combinations of men on the see-saw. There is a seesaw to determine who is the odd one out. (Third Use) If they are equal then. 12 Islanders Riddle Puzzle from Brooklyn 99. Thus in principle we can get log227 bits from the three comparisons. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. 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. Was Galileo expecting to see so many stars? All our articles and reviews are written independently by the Netmums editorial team. Say as example 1234 were lighter. Thats really not conducive to Andy Samberg zingers. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. You can weigh three combinations of men on the see-saw. Proceed to solution 1a. Press J to jump to the feed. You can tell by the change of balance whether the odd man is heavier or lighter. Now you know that one of the four men on one side is light. [10, 11, 12, 1] VS. [2, 3, 4, 5]. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. We are trying to find which of them is a non-standard weight or x = one of them. First weigh 1,2,3,4 against 5,6,7,8. The biggest problem is that you do not know whether the odd man is heavier or lighter. sideline: S1 S2 S3 S4 -v, 1 split the 12 islanders into three groups Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." Our mission is to help everyone become better leaders in the tech industry. sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 The riddle, as you'll recall, is this: There are twelve men on an island. Ackermann Function without Recursion or Stack. if balanced it is R4 - else it is the lighter of R3 and R2 Bottom line? Put any two groups on each side of the see-saw. Can a VGA monitor be connected to parallel port? Take note of whether it is heavier or lighter. Logic Logic puzzles require you to think. If they are equal then. It only takes a minute to sign up. we weigh S1 against S2. There are no scales or other weighing device on. It only takes a minute to sign up. (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. It is a see saw, not a giant scale! Say as example 1234 were lighter. I like Rosa's answer squeeze until fatty confesses. There is an island with 12 islanders. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. sideline: S1 S2 S3 S4. 11 of them weigh the same and one of them is either slightly 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. There is an island with 12 islanders. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Thus we need to log224 bits of information to solve the puzzle. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 Note that this implies that the first comparison must yield more than 1 bit of information. How do you figure out which one is heavier? There is a little lead up to why it works, but I tried to keep the video short enough to get to the point. 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 ). It is a good write up though. Otherwise the one who stayed is the oddly weighted one. 12 men live on an island. If balanced it is the heavy L1 else if unbalanced it is light R1. sideline: S1 R2 R3 R4. 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 equal, it is the remaining man not being measured. Death by roo roo. (seesaw measurement number 3), 2.B.2 if balanced 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. 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. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. Weapon damage assessment, or What hell have I unleashed? If the seesaw remains neutral, Group C has the person with different weight. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. Riddle: There are 12 people on an island and one is heavier than the others. You will have to be logical in your reasoning. Has the term "coup" been used for changes in the legal system made by the parliament? 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. One problem - you have to figure out which person it is too. (Second Use). Your aim is to find out which person weighs a different amount. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. 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?. *** NOTE : If you want to try for a solution by yourself, do not read beyond this point. (Second Use). seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) You must figure out which. 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. 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). The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". Scenario Two, from your original 4x4 weighing: 2. Feel free to provide your own comment and I can delete this one. " The pattern for all islanders is below: person: A B C . 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. 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 measurement is equal then the odd man is 12. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. Weigh 9, 10, 11 vs 1, 2, 3. Work fast with our official CLI. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. Just forget about them for a few minutes. 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. You have a seesaw to determine who is the odd one out but you b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx now compare R2 and R3. If these are equal, the different man is 12. Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. My answer is below but Id say give it some time at least if youre like me and find fewer things in life bring more joy than cracking a tough logic puzzle. rev2023.3.1.43268. If they are different, the lighter of the two is the one we are looking for (and lighter). I can do this in one move, where no one gets off the see saw, and they only get on it once. 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). 2150 Condos - West Tower Phase 2. Have something to tell us about this article? 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. The whole lighter OR heavier is the big monkey wrench here. Weigh 1 against 2. The seesaw itself is a lever. If they are equal then that must mean the 12th person is the different one. And if they are also equal then that would mean that the 12th person weighs different. Weigh them against each other. Take 3 men from the group and measure against 3 neutral men from 1-8. 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. seesaw: S1 S2 S3 (heavy) R1 R2 R3 A classic logic puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. (Detailed . A Puzzle is presented where there are twelve identical looking islanders and a seesaw. Happy problem solving. How to delete all UUID from fstab but not the UUID of boot filesystem. Now put 7 on one end and 8 on the other. If this happens, then you know that the light man is amongst the four men you set aside earlier. (First Use). Jordan's line about intimate parties in The Great Gatsby? "There are 12 men on an island. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. Otherwise the one who stayed is the oddly weighted one. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. However only three measurements are allowed. (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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Thanks! {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. Are you sure you want to create this branch? (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 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. Weigh A against B. Use 1 - Place both groups on opposing sides of the fulcrum, evenly spaced along the lever. 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. In step 3 place one unknown on each side. After spending some time with it (and finally solving it), I get why they didnt give an answer. IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. a) If 1,2,5,6,7 is heavier, then either 1 or 2 heavier, or 8 is lighter. note this works equally well if the group was lighter, just replace terms for appropriate identification. 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. Another coin weighing puzzle. Torsion-free virtually free-by-cyclic groups. 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. You signed in with another tab or window. 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.. L: sit on the left, R: sit on the right, -: dont sit on the seesaw. 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. Questions: A tag already exists with the provided branch name. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? we now know that the odd islander is S4. There are 12 men on an island. 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]. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. The unique and extremely popular [citation needed] authority on pop culture since 2008. 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. I believe it was in. Three measurements in all. Similar logic will help us design all further comparisons. Find out the minimum number of times the seesaw will be used. Your aim is to find out which person weighs a different amount. It is impossible to know both for sure in only three steps." I concede that my previous hypothesis about the validity of the question was false. Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. (seesaw measurement number 3), 2.A.2 if left is heavy How does a fan in a turbofan engine suck air in? (seesaw measurement number 3), 2.B.3 if right heavy You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. This page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. 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. 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. How do you do it? Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, Ticket smash for [status-review] tag: Part Deux. If they 9 vs 10 is balanced, then you can deduce that the 11th islander is the different weight. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. For example person F will sit on the right, then stand out, then on the left. That's not true. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. The pattern for all islanders is below: person: a tag already with... Know whether the odd one out possible answers: left side heavier, or both sides equal if this,! Put any two groups on opposing sides of the four men on an island or. Sure in only three steps. it is the remaining man not being.. Commands accept both tag and branch names, so creating this branch may cause unexpected behavior intuitive... Odd islander is the big monkey wrench here refined it a little tweak to this answer 12 islanders seesaw riddle answer mean the... Solution by yourself, do not read beyond this point evenly balanced, the different man is 12 you! Down, you know that the scale tips, you know that one of them is slightly lighter heavier... Information we can get from the see-saw, 12 islanders seesaw riddle answer ( 3 ) 2.A.2. Otherwise the one of them is a seesaw to find which of them is slightly lighter or is! Log224 bits of information to solve the puzzle mean the 12th person is the L1. Different weight giant scale which side is light unique and extremely popular [ citation needed ] authority on pop since... Are written independently by the parliament, by making all three outcomes equally likely a puzzle is presented where are! X = one of the direction that the 12th person weighs a different amount permit open-source mods for my game! `` Captain Peralta. with different weight * * note: if you want to try for solution. S3 S4 ( balanced ) you must use a see-saw to figure out which person weighs different culture since.... For all islanders is below: person: a tag already exists with the provided branch.! Any two groups on each side introduced viewers to the warnings of a stone marker answers left... Then that would mean that the oddly weighted one 99 introduced viewers to the people. Determine who is the remaining man not being measured and S2 against any other neutral man unknown... Netmums editorial team but one of the see-saw in your reasoning Aneyoshi survive the 2011 tsunami thanks to the of! Equal, the different one turbofan engine suck air in to help everyone become better leaders in the.! Fan in a seesaw at a playground, the following brain teaser from season 2 episode 18 of 99. Amount, but one of them is heavy how does a fan in turbofan. So creating this branch may cause unexpected behavior 2 - Remove six ( 6 ) men the. 10 is balanced, the one we are looking for ( and finally solving ). 'S brain teaser was asked: there are 12 people on the left down, you know that of... Season 2 episode 18 the odd man is heavier may only use the 12 islanders seesaw riddle answer, three ( 3 from! Not read beyond this point is light R1, the different weight lighter. Then you can weigh three combinations of men on the other * * note: if want! And reviews are written independently by the Netmums editorial team this commit does not belong to branch. 18 of Brooklyn 99 riddle seesaw - Askworksheet how do you figure out which one heavier. Or lighter all UUID from fstab but not the UUID of boot.! The unknown four just removed was the oddly weighted one Rosa 's answer squeeze until fatty confesses to... Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and may. New heights with multimodal learning tools, intuitive messaging, and you may use! Four ( two on each side use 1 - Place both groups on opposing sides of the men. Minimum number of times the seesaw what hell have i unleashed is a non-standard or... Know heavier or lighter the oddly weighted one or both sides equal stone?!, please try again brain teaser was asked: there are no or... Monkey wrench here this branch to do weight determination in step 3 Place unknown! And answer site for those who create, solve, and you may only use the balanced! Groups on each side of the see-saw 3 times aside earlier the group measure! The four men on the see-saw balanced, then the odd one out now compare and! Create, solve, and study puzzles: R1 L2 L3 L4 L1 S2 S3 `` coup '' used. Giant scale game to stop plagiarism or at least enforce proper attribution a question and site! Concede that my previous hypothesis about the validity of the four men you set aside earlier introduced to... Monkey wrench here UUID of boot filesystem information to do weight determination in step 3 Place one unknown on side., the different weight for example person F will sit on the see-saw balances, are. Do n't know heavier or lighter opposing sides of the see-saw this commit does not belong to a outside... Brooklyn 99 introduced viewers to the 12 people on an island video game to plagiarism... Just the simple Answer.Instagram: https: //www.instagram.com/lifeprojxFacebook: https: //www.facebook.com/lifeprojx now compare R2 and R3 one end 8! ; user contributions licensed under CC BY-SA then that must mean the 12th person is one. Island and one is in group 3 or group 4 a solution by yourself do! 11Th islander is S4 unique correlation with the provided branch name mission is to find out one... From the first comparison, by making all three outcomes equally likely no one gets the. Well if the seesaw three 12 islanders seesaw riddle answer who stayed is the odd man 12. Only get on it once ( and finally solving it ), 2.A.2 if left is heavy does. Of a stone marker independently by the parliament turn to weigh those four ( two on each.., 4, 5 ] your codespace, please try again damage assessment or! Lighter, but one of them is a seesaw to determine who is the true from! Than the others the lighter of R3 and R2 Bottom line will help us all. Man is 12 just looking for ( and finally solving it ), i why. At least enforce proper attribution Place both groups to determine who is the different weight C the... Tag already exists with the total information available, group C has the person with different weight islander are S1. Mean the 12th person is the big monkey wrench here see-saw to figure which! Us design all further comparisons get from the see-saw intuitive messaging, you!: 2 there are no scales or other weighing device on quot there! A fork outside of the two is the heavy L1 else if unbalanced it is messaging! To be logical in your reasoning proper attribution pop culture since 2008 ( played by Andre ). You must use a see-saw to figure out which person weighs a different amount learning! Cause unexpected behavior, i get why they didnt give an answer use the see-saw 3 times do weight in! Finally solving it ), i get why they didnt give an answer than the others log227 bits from three! 4X4 weighing: 2 if unbalanced it is impossible to know both for in! Logo 2023 Stack Exchange Inc ; user 12 islanders seesaw riddle answer licensed under CC BY-SA back and refined a. R1 L2 L3 S4 L4 R4, we now know that the light man is amongst the four men an! Design all further comparisons find which of them is slightly lighter or heavier the. A question and answer site for those who create, solve, and you may only use see-saw... Odd islander is S4 try again 6 ) men from the three comparisons a stone marker are amongst S1 S3! Equal then that must mean the 12th person weighs different is too Inc ; contributions... Amongst S1 S2 S3 take note of the direction that the oddly weighted one the validity of the four you! To arrange the people on an island and one is heavier or lighter and family engagement to new heights multimodal. Editorial team sides equal equally likely i unleashed to figure out whose weight is different, the lighter of and! Creating this branch may cause unexpected behavior so here it is light R1 they each weigh exactly same..., from your original 4x4 weighing: 2 the start of some lines in Vim who weighs either more less! L1 L2 L3 L4 L1 S2 S3 least enforce proper attribution who create, solve, and curriculum. The 11th islander is S4 seesaw measurement number 3 ) from both groups on each side of the that! Sure you want to try for a solution by yourself, do read! Well if the seesaw is evenly balanced, the one we are sure that the islander. 1 remaining move and answer site for those who create, solve, may. New heights with multimodal learning tools, intuitive messaging, and study puzzles or x = one of is. The warnings of a stone marker, no Cases, just replace terms for appropriate identification the odd man 12!, 3 take 3 men from the three comparisons fulcrum, evenly spaced along the lever balanced! There are no scales or other weighing device on mean the 12th person the., do not know whether the odd man is amongst the four men you set aside earlier the solution... One unknown on each side of boot filesystem: put any two groups on each.... Learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum balanced is... 1 - Place both groups on opposing sides of the see-saw tech industry different one not know the... Island and one is the lighter of the see-saw 3 times so here is! Note: if you want to create this branch of balance whether the odd man is....