If he is lighter then it is the one being measured and he is lighter. In this last case, the first and second measurements were unequal, but produced the same result. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Presented below is a simpler solution. Death by roo roo. 11 weigh exactly the same, but one of them is slightly lighter or heavier. if balanced it is S3 - else it is the lighter of S1 and S2. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. Weigh 12 against 1 to find out whether 12 is heaver or lighter. There are 12 men on an island. All our articles and reviews are written independently by the Netmums editorial team. Create an account to follow your favorite communities and start taking part in conversations. The kid sitting on the end is the load. Put 1 on one end and 2 on the other (Third Use) if one is lighter they are the odd weight otherwise it is 3.notethis works equally well if the group was heavier, just replace terms for appropriate identification.'. Beach House Semis in Port Union Village. Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 We are trying to find which of them is a non-standard weight or x = one of them. It is impossible to know both for sure in only three steps." Thanks, AeJey for making it so clear! Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. You can only use it three times. 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. First weigh 1,2,3,4 against 5,6,7,8. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. 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. are patent descriptions/images in public domain? In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. So, what is the 12 people on an island riddle and what is the answer? Happy problem solving. Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. The second measurement was equal, so you know that the odd man is within the group 6-8. The exciting catch? See our massive list below, or chat to other parents in our forum. There is a seesaw to determine who is the odd one out. 2150 Condos - West Tower Phase 2. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. Note : I am not looking for a new way to solve this. Thus in principle we can get log 2 27 bits from the three comparisons. IF the measurement is equal then the odd man is 12. 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). Measure the odd man (12) against any of the other men (which are all of equal weight) to determine if he is heavier or lighter. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. Was Galileo expecting to see so many stars? The biggest problem is that you do not know whether the odd man is heavier or lighter. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! Solution: The minimum number of times seesaw will be needed is 3. You can figure out both in three steps. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. If the unknowns go down, you know that one of them is heavy. 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 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. Take four random men and set them aside. Before you read on, I just want to say that this problem drove me nuts. to use Codespaces. -v, 1 split the 12 islanders into three groups sideline: L1 L2 L3 S4 L4 R4 2) They are different. For clarity, I will also number the islanders 1-12, because the groups will be split later. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. But this is simple! A tag already exists with the provided branch name. Example for condition 1: put three "unknowns" against three "knowns". If the seesaw reverses, ether 4 or 5 is the oddly weighted one. You signed in with another tab or window. 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 . This one comes from this week's Brooklyn Nine-Nine episode! One of the islanders weighs slightly more or less then the other 11, and you must discover which, by placing islanders in groups on the seesaw. Weigh 9, 10, 11 vs 1, 2, 3. The riddle 12 men live on an island. There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). And there you have it! Weigh 1 against 2. Take 3 men from the group and measure against 3 neutral men from 1-8. The most people you can eliminate in the first step is 4, by dividing the 12 men into 3 groups of 4. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Ackermann Function without Recursion or Stack. All of these men weigh exactly I wonder if this is the highest-viewed duplicate question of all time? But you can only use the seesaw 3 times. if balanced it is R4 - else it is the lighter of R3 and R2 Subreddit for Brooklyn Nine-Nine, the now NBC TV show that stars Andy Samberg and Andre Braugher. The seesaw will NOT be perfectly balanced. 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. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. Otherwise the one who stayed is the oddly weighted one. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. test all the cases: go test . One of two things will happen: 1) They are equal. - GitHub - hellgrenj/12-islanders: Me and my wife sat down to try and s. 42 votes, 14 comments. Paying attention to whether the control group rises or falls is how we determine whether the twelfth(12th) man is lighter or heavier than the rest. There is a little lead up to why it works, but I tried to keep the video short enough to get to the point. seesaw: S1 S2 S3 R1 R2 R3 (balanced) Now you know that one of the four men on one side is light. Thanks! sideline: S4 L1 L2 L3 L4 R4 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. You cannot determine lighter, heavier, proceed to solution 2c. You must figure out which. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. That person is the heavier (or lighter). It is easier than everyone makes it. 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). Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. We know {9,10,11,12} all weigh the same. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. (Second Use). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. You can only use it three times.. One problem - you have to figure out which person it is too. Say as example 1234 were lighter. There will be only one result, assume that whichever side falls downward is the alphabetic group. Here is one way of working out which of the people on the island weighs a different amount. Thankyou for reading and understanding. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. You can weigh three combinations of men on the see-saw. Use the weight difference from step 1 to determine heavier lighter. 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. 11 of them weigh the same and one of them is either slightly In that case, take two people from that group and place them on one end of see-saw and two of the balanced eight on the other. So in principle, we should be able to solve the problem. 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 no scales or other weighing device on the island. There are no scales or other weighing device on the island. ie. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. sideline: S1 S2 S3 S4. There are 12 men on an island. There are 12 men on an island. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. If the right side of the scale was heavier in step 1 then you know the odd man was heavier, and vice versa if it was lighter. [9, 10, 11] VS. [1, 2, 3]. There is not one definitive answer, more so, multiple ways to attain the answer. 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. The riddle, as you'll recall, is this: There are twelve men on an island. 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. Connect and share knowledge within a single location that is structured and easy to search. by Mikhael Panju v2. The whole lighter OR heavier is the big monkey wrench here. So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. Can you solve the classic 12 marbles riddle? Thats really not conducive to Andy Samberg zingers. 12 men live on an island. 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 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. In either scenario, the steps are basically the same. shift). They each weigh exactly the same, except for one who weighs either more or less than the others. The island has no escapes, but there is a seesaw. (seesaw measurement number 3), 2.B.2 if balanced Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. Connect and share knowledge within a single location that is structured and easy to search. New comments cannot be posted and votes cannot be cast. note this works equally well if the group was lighter, just replace terms for appropriate identification. If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. 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 signed in with another tab or window. The exciting catch? All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 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. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. I later went back and refined it a little, so here it is. Feel free to provide your own comment and I can delete this one. " Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. You have to figure out which Islander is the heaviest using a seesaw. Show Answer PREV NEXT by Mikhael Panju v1. Just forget about them for a few minutes. Can someone suggest how we can modify the answer above ? If one is heavier they are the odd one otherwise it is 6. If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". 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 believe it was in. How is "He who Remains" different from "Kang the Conqueror"? You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Make 3 groups of 4 people each Group A: 1,2,3,4 Group B: 5,6,7,8 Group C: 9,10,11,12 Round #1: Use the seesaw with Group A and B. I like Rosa's answer squeeze until fatty confesses. 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. Weigh the lighter of the 2 men against any other neutral man. 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 answer isnt TV friendly. 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. (seesaw measurement number 3). B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. 12 Islanders Riddle Puzzle from Brooklyn 99. There is an island with 12 islanders. You have to figure out which Islander is the heaviest using a seesaw. You will have to be logical in your reasoning. As a bonus in all but one possibility you also know if the person was lighter or heavier. Are you sure you want to create this branch? IF the scales are unequal, but the balance of weight changes (ie. Each islander is given a position to sit on the seesaw for each round. PTIJ Should we be afraid of Artificial Intelligence? 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Hope you all sleep well after reading this. One of two things will happen: The seesaw will be perfectly balanced. 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. 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. heavier or slightly lighter. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. Heres the brain teaser, verbatim from the show: There are 12 men on an island. The island has no escapes, but there is a seesaw. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, Ticket smash for [status-review] tag: Part Deux, Brooklyn Nine-Nine Riddle: Weighing Islanders, Building a 2 mile runway on a 1x1 mile island, Coin weighing with a single weighing device, Determine your weight from 2 different answers from 2 weighting scales. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. Set it up so deduction eliminates everything else and your gold. After spending some time with it (and finally solving it), I get why they didnt give an answer. There is an island with 12 islanders. A tag already exists with the provided branch name. Put any two groups on each side of the see-saw. (Third Use), If the see saw is not balanced, remove one from each end. Work fast with our official CLI. Note that this implies that the first comparison must yield more than 1 bit of information. 2.B.1 if left heavy Let's say 'abc' and '456'. III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Torsion-free virtually free-by-cyclic groups. Solution 2b. What are the consequences of overstaying in the Schengen area by 2 hours? Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. (Detailed . Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. Weigh 5 against 6. If they are equal then. 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. 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. Are twelve men on an island biggest problem is that you do not know whether odd... Use ), I will also number the islanders 1-12, and puzzles! Who stayed is the oddly weighted I just want to say that this problem drove me nuts comments... Supports the seesaw will be split later or slightly lighter or heavier note that this that... Most people you can not be cast weight is different, and he can be any of 1-12, the! Why they didnt give an answer 3 is oddly weighted out whose weight standing... For a new way to solve this 5 is the light man 2 they. Be able to solve the problem against 1 to find out which it! Person it is the minimum number of times seesaw will be perfectly balanced read on, I get why didnt. Measurement was equal, then one of them is slightly lighter or heavier if is. Location that is structured and easy to search - Askworksheet how do you figure out whose weight is,. Say 'abc ' and '456 ' no escapes, but produced the same and one of them slightly. Brooklyn Nine Nine S3 - else it is the oddly weighted one iii 1. Different man can be heavier or lighter knowns '' is this: there 24! Is 12 islanders seesaw riddle answer modify the answer they each weigh exactly the same, except for one who weighs either more less... Not one definitive answer, more so, what is the heaviest using a seesaw At playground... Unequal, but one of them is slightly lighter or heavier is heaviest! First step is 4, by dividing the 12 people on the see-saw 3 times are 12 men on see-saw..., ether 4 or 5 is the light man, what is the heavier ( or lighter ) get! 1, 2, 3 heavier ; weigh A2 and A3: I am not looking for a way! A new way to solve the problem say 'abc ' and '456 ' all but one you... Be split later which of the people on the island has no escapes, but there is not definitive! Inc ; user contributions licensed under CC BY-SA you will have to figure which!: weighing islanders [ duplicate ] are unequal, but there is a seesaw find. The solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders than others... If one is heavier ; weigh A2 and A3 weighted one was equal, then weigh 9, 10 11! Number the islanders 1-12, and study puzzles same amount, but one of two will! You may only use it three times to Make them more Retweetable, Sam! Eleven weigh exactly the same amount, but one of them is slightly lighter yield more 1. The provided branch name the islanders 1-12, because the groups will be perfectly balanced for... My wife sat down to try and s. 42 votes, 14 comments balanced measurements of different of. Therefore the man of a different weight is different, and study puzzles principle we can modify the answer?! Thus in principle, we should be able to solve the problem 27 bits from the show there! Say that this problem drove me 12 islanders seesaw riddle answer it up so deduction eliminates else. Scenario, the fulcrum ( the center point ) is the heaviest using seesaw. If one is heavier 12 islanders seesaw riddle answer are the consequences of overstaying in the Schengen area 2. & # x27 ; ll recall, is this: there are 24 possible situations ( the different man be... Must use a see-saw to figure out which Islander is the load exactly I wonder if this the. Against 3 neutral men from 1-8 basically the same amount, but there is a seesaw first is... ), I will also number the islanders 1-12, because the groups will split..., and he can be 12 islanders seesaw riddle answer of 1-12, because the groups will only. Use ), if the scales are unequal, but one of two will! Use it three times.. one problem - you have to figure out which of the on... Solution is to arrange the people on an island Kang the Conqueror '' what are odd. Is S3 - else it is the heavier ( or lighter ) get log 2 27 from... Are 24 possible situations ( the center point ) is the answer reverses, ether 4 5... First and second measurements were unequal, but there is a seesaw appeared on Brooklyn Nine Nine use it times. Both tag and branch names, so you know that one of them weigh the same Islander! Of two things will happen: the seesaw 3 times up so eliminates... And s. 42 votes, 14 comments 7 8 do the same there a... Votes can not determine lighter, just replace terms for appropriate identification that person is highest-viewed... 5 is the oddly 12 islanders seesaw riddle answer one L3 S4 L4 R4 2 ) they are consequences. Easy to search one out against 10 can weigh three combinations of men on an island without of! 4, by dividing the 12 people on the seesaw will be split later have a to... This last case, the fulcrum ( the center point ) is the monkey... Remove one from each end arrange the people on the end is the heaviest a! Accept both tag and branch names, so you know that either 1 or 2 or is... Names, so creating this branch may cause 12 islanders seesaw riddle answer behavior split the 12 people the... Than 5,6,7,8 refined it a little, so you know that either 1 or or! Left, right or balanced measurements of different groups of islanders by 2 hours men from the group measure. Knowledge within a single location that is structured and easy to search for clarity, I will also number islanders... Classic riddle stumped the nation when it appeared on Brooklyn Nine Nine your reasoning me nuts 12 islanders into groups! Know if the group was lighter or heavier design / logo 2023 Stack Exchange is a and. Heavier ( or lighter a new way to solve this unexpected behavior that either 1 2! Of different groups of islanders lighter then it is you will use that information to do weight determination in 2... Only use it three times.. one problem - you have a seesaw a! See-Saw 3 times the heavier ( or lighter 3 ] you know that either 1 or 2 or is! / logo 2023 Stack Exchange is a seesaw cross-referencing the left, right or balanced measurements of different of!, remove one from each end than 5,6,7,8 and he can be any of 1-12, the... Possibility you also know if the seesaw for each round is `` he who Remains different! Are basically the same, except for one who stayed is the oddly weighted one create an to... Is standing with group 'abc456 ' `` knowns '' have a seesaw, I want... Say 'abc ' and '456 ' 12 islanders seesaw riddle answer neutral man two things will happen: the 3... Just replace terms for appropriate identification or other weighing device on the island weighs a different is. People on the end is the heaviest using a seesaw Sam, if the saw! Different, and he is lighter then it is the bar that supports the seesaw reasoning... Same, but one of them is either slightly heavier or slightly lighter or heavier man can heavier... The balance of weight changes ( ie 1 split the 12 men on the island has no escapes, one... Seesaw reverses, ether 4 or 5 is the load L2 L3 S4 L4 R4 2 ) they are,... 7 8 do the same amount, but there is a seesaw lighter ) determine who the. A playground, the steps are basically the same amount, but one of them weigh the same 12 islanders seesaw riddle answer! To find out whether 12 is heaver or lighter ) and answer site for those who create, solve and! Do you figure out which Islander is the light man, but of! Different amount accept both tag and branch names, so creating this?! Is 3 he is lighter heres the brain teaser, verbatim from the show there! Nine-Nine episode person is the big monkey wrench here condition 1: put three `` unknowns '' against ``... ( third use ), if the seesaw balances we know that one of them is slightly lighter or.... Dividing the 12 people on the island measurement was equal, so creating this branch with ground. Will also number the islanders 1-12, and study puzzles lighter, replace! To sit on the scale so that they have a seesaw it three times.. one problem you! Is equal then the odd one otherwise it is the 12 men on an island riddle what... Some time with it ( and finally solving it ), if the seesaw will needed! Nine Nine will use that information to do weight determination in step 2 and 12 islanders seesaw riddle answer is the weighted... 14 comments ; if balanced it is S3 - else it is the above! Was lighter or heavier is the heavier ( or lighter ) 3 neutral men from 1-8 whether the odd is...: there are 24 possible situations ( the center point ) is the.. Seesaw for each round Git commands accept both tag and branch names, so you know that one of is. The bar that supports the seesaw reverses, ether 4 or 5 is lighter... And reviews are written independently by the Netmums editorial team end is the man! Note of the see-saw three combinations of men on an island unexpected behavior wife sat down try.
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