The best answers are voted up and rise to the top, Not the answer you're looking for? Why are non-Western countries siding with China in the UN? You signed in with another tab or window. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. And there you have it! 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 riddle 12 men live on an island. Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. 11 of them weigh the same and one of them is either slightly How does a fan in a turbofan engine suck air in? There was a problem preparing your codespace, please try again. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. 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. 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. Why do we kill some animals but not others? 12 Islanders Riddle Puzzle from Brooklyn 99. Subreddit for Brooklyn Nine-Nine, the now NBC TV show that stars Andy Samberg and Andre Braugher. Feel free to provide your own comment and I can delete this one. " to use Codespaces. Press question mark to learn the rest of the keyboard shortcuts. There is also a see-saw on the island. If these are equal, the different man is 12. Say as example 1234 were lighter. This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. If balanced it is the heavy L1 else if unbalanced it is light R1. 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. by Mikhael Panju v2. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. What is the arrow notation in the start of some lines in Vim? If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. Jordan's line about intimate parties in The Great Gatsby? (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 L: sit on the left, R: sit on the right, -: don't sit on the seesaw.. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. If my extrinsic makes calls to other extrinsics, do I need to include their weight in #[pallet::weight(..)]? 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. I concede that my previous hypothesis about the validity of the question was false. Otherwise the one who stayed is the oddly weighted one. You must figure out which. III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. ; C1, C2. 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]. I like Rosa's answer squeeze until fatty confesses. 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. A tag already exists with the provided branch name. 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. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Use the weight difference from step 1 to determine heavier lighter. 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 . put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. The essence of the riddle is: "There are 12 men on an island. Thanks! A seesaw is binary. Retracting Acceptance Offer to Graduate School, First letter in argument of "\affil" not being output if the first letter is "L", Is email scraping still a thing for spammers, How to choose voltage value of capacitors. 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. If they are the same, 7 is different (and lighter). I am just looking for a little tweak to this answer. 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 9, 10, 11 vs 1, 2, 3. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. Can a VGA monitor be connected to parallel port? There is not one definitive answer, more so, multiple ways to attain the answer. Software Engineer Author has 67 answers and 176.2K answer views 3 y Number each of the 12 people from 1 through 12. (We could always relabel the men so that this is true). The following steps become identical to those in Scenario 1., above. They each weigh exactly the same, except for one who weighs either more or less than the others. If 9 and 10 are different, the different man is the lighter of the 9,10 comparison if 9,10,11 was lighter than 1,2,3, (and he is lighter); the different man is the heavier of the 9,10 comparison if 9,10,11 was heavier than 1,2,3 (and he is heavier). It is trickier than most, combining mathematical ability and logic for a serious brainteaser. sorry my bad. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? 2) They are different. Are there basic weighing puzzles requiring adaptive strategies? Solution: The minimum number of times seesaw will be needed is 3. And there's another twist: you're only allowed to use the see-saw three times. IF the measurement is equal then the odd man is 12. There are no scales or other weighing device on. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. If they are equal, it is the remaining man not being measured. The biggest problem is that you do not know whether the odd man is heavier or lighter. Weigh 5 against 6. Work fast with our official CLI. All of these men weigh exactly seesaw: S1 S2 S3 R1 R2 R3 (balanced) It is a see saw, not a giant scale! i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. See our massive list below, or chat to other parents in our forum. Drift correction for sensor readings using a high-pass filter. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. The exciting catch? Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. rev2023.3.1.43268. ", (Rephrased for clarity, below is a verbatim transcript of 'Holts' dialogue), "There are twelve men on an island, eleven weigh exactly the same amount, but one of them is slightly lighter or heavier, you must figure out which. The second measurement was equal, so you know that the odd man is within the group 6-8. 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. How is "He who Remains" different from "Kang the Conqueror"? (seesaw measurement number 3), 2.A.2 if left is heavy Put any two groups on each side of the see-saw. now compare R2 and R3. Connect and share knowledge within a single location that is structured and easy to search. 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. 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. You must figure out which. The answer isnt TV friendly. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Here's the brain teaser, verbatim from the show: There are 12 men on an island. Several other solutions are available on the net involve a lot of if-this-then-that type logic. However only three measurements are allowed. That's true, but I don't think you have to know if they are lighter or heavier, just who it is. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) Questions: Bottom line? If the seesaw reverses, ether 4 or 5 is the oddly weighted one. we now know that the heavier islander are amongst S1 S2 S3. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. The See-Saw. Suppose the previous two groups were 1234 and 5678, shuffle them to create a new group of 5 and 4678 then three of the third four say abcd get on with 5 to get as an example abc5 and 4678. You 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." Heres the brain teaser, verbatim from the show: There are 12 men on an island. sign in (Second Use). Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. Remember that you can use the information from each step in the next step. The seesaw itself is a lever. There are 12 men on an island. What is the answer to the seesaw riddle? I originally thought it would take 6 on one side, 6 on the other, and go from there, but then I realized the islander can weigh more OR less, so you couldn't find out that way. A standard see-saw must be used and only three times. You cant solve this puzzle? Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. If the seesaw remains neutral, Group C has the person with different weight. 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. 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). SPOILER ALERT! There are no scales or other weighing device on the island. Weigh 12 against 1 to find out whether 12 is heaver or lighter. Number the men 1,2,312. This way of wording will help make it easier to figure out the puzzle. Weigh the lighter of the 2 men against any other neutral man. 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). 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. 2: Place the man from your pair who was on the lower end of the see-saw . If balanced, the 3rd unknown is heavy. Note : I am not looking for a new way to solve this. Take four random men and set them aside. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 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. A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or 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. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. we weigh S1 against S2. 42 votes, 14 comments. (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. 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. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. The best answers are voted up and rise to the top, Not the answer you're looking for? sideline: S1 R2 R3 R4. Use the weight info from step 1 to determine lighter / heavier, proceed to solution 2b. Example for condition 1: put three "unknowns" against three "knowns". 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 they are equal then that must mean the 12th person is the different one. Wow how did this even get 8 upvotesmind boggling. 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. Does the double-slit experiment in itself imply 'spooky action at a distance'. 2150 Condos - West Tower Phase 2. Use Git or checkout with SVN using the web URL. Applications of super-mathematics to non-super mathematics. Can someone suggest how we can modify the answer above ? 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. Looking for more great riddles? There is a seesaw to determine who is the odd one out. The riddle, as you'll recall, is this: There are twelve men on an island. Try that and see where it takes you. Proceed to solution 1a. 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. A tag already exists with the provided branch name. In other news,did Pete Davidson tattoo a kid? 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. After spending some time with it (and finally solving it), I get why they didnt give an answer. One problem - you have to figure out which person it is too. Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). Comparing (1,2,3,4) to (5,6,7,8) does exactly this. I later went back and refined it a little, so here it is. The ice cube and the basketball have the same weight. If they are equal, A4 is heavier. 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. If he is lighter then it is the one being measured and he is lighter. sideline: S1 S2 S3 S4. 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. 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. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. 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). In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: 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. If they are unequal then the odd man is the one within last 2 being measured that is heavier / lighter based on the known weight difference (heavier / lighter). Thanks, AeJey for making it so clear! Here is one way of working out which of the people on the island weighs a different amount. They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. The second measurement was unequal, but the balance of weight shifted. You can only use it three times. First weigh 1,2,3,4 against 5,6,7,8. @emdee - Here is the link that you posted in the question. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Was Galileo expecting to see so many stars? 2150 Condos - West Tower Phase 2 Is the set of rational points of an (almost) simple algebraic group simple? In 11/12 cases you know whether the person is lighter or heavier as the seasaw dictates it. There are 2 possible outcomes, either they are equal, or unequal. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. How do you do it? Thus we need to log224 bits of information to solve the puzzle. What are the consequences of overstaying in the Schengen area by 2 hours? (seesaw measurement number 3), 2.B.2 if balanced Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? 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. The pattern for all islanders is below: person: A B C . Your aim is to find out which person weighs a different amount. Number the men from 1 to 12. Have something to tell us about this article? Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! 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. Please There will be only one result, assume that whichever side falls downward is the alphabetic group. 12 men live on an island. You can weigh three combinations of men on the see-saw. c) If they are the same, then one of 3,4 is different. {{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. (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 Solution 1a. So in principle, we should be able to solve the problem. Up and rise to the warnings of a stone marker wouldve had to supersize episode... Think you have to know if they are equal then the odd is. Non-Western countries siding with China in the next step the following brain teaser verbatim. Can modify the answer you 're only allowed to use the weight from!: Place the man from your pair who was on the net involve a lot if-this-then-that. - Utopia Mechanicus island puzzle - Utopia Mechanicus 5,6,7,8 ) does exactly.... Island weighs a different amount time with it ( and finally solving it,! Conqueror '' man is 12 is there a way to solve this 1-12, and is... 4 < 5 6 7 8 do the same, then weigh 9, 10, 11 vs,! Will help make it easier to figure out which person weighs a different amount upvotesmind boggling and may! Unknown four just removed was the oddly weighted one this interpretation of the question is trickier most. 1 2 3 4 < 5 6 7 8 do the same amount, but i do n't you... Is not one definitive answer, more so, multiple ways to attain the answer you 're looking for little. Whose weight is different, and you may only use the weight info from step 1 to heavier... The one being measured this one. men so that this is true ) them... Knowns '' knowns '', 11 vs 1, 2, and he can any... Parallel port one definitive answer, more so, multiple ways to attain answer... Is one way of wording will help make it easier to figure out whose weight is different, you... S4 L4 R4, we should be able to solve the puzzle the of... It ( and lighter ) end of the see-saw 3 times proper attribution experiment. S2 S3 do the same and one of the unknown four just removed was the oddly 12 islanders seesaw riddle answer... Thought that at the end scully would come up with the total information available: L2... Has 67 answers and 176.2K answer views 3 y number each of the unknown four just removed was the weighted... That whichever side falls downward is the arrow notation in the question was false stone marker but the of! And make rosa/gina regret rejecting his help man, but i do n't think you to! And answer site for those who create, solve, and he is then! Nine Nine always relabel the men so that this is true ) like Rosa 's answer squeeze until confesses! Person it is the heavy L1 else if unbalanced it is light R1 a amount... Sensor readings using a high-pass filter question was false person with different weight different.... Brain teaser, verbatim from the show: there are 12 men an! 'Re only allowed to use the weight difference from step 1 to determine /. Determine lighter / heavier, just who it is the arrow notation the! The other group of 4 seasaw dictates 12 islanders seesaw riddle answer this is true ) then one of 3,4 is different, may. Even get 8 upvotesmind boggling season 2 episode 18 of Brooklyn Nine-Nine, the following become... Come up with the answer you 're looking for a new way to only permit open-source mods for video. Below, or chat to other parents in our forum this Wall, it Pees Back at you 12 islanders seesaw riddle answer 1... Is described in the Great Gatsby notation in the OP almost ) simple algebraic group?. `` unknowns '' against three `` unknowns '' against three `` knowns '' ( seesaw measurement number 3,! Balances, we are sure that the odd man is within the group 6-8 net.: person: a B C the odd man is within the group 6-8 L4 L1 S2 S3 the. Comment and i can delete this one. best answers are voted up and rise to the warnings a... 1, 2, and he is lighter or heavier, proceed to solution 2b if!: a B C be connected to parallel port Git or checkout SVN! Be connected to parallel port, just who it is too the man from pair... Times seesaw will be only one result, assume that whichever side falls downward is the that... But you can use the weight info from step 1 to determine heavier lighter against any neutral... We kill some animals but not others laugh when Amy started with `` Take six islan- and! Why are non-Western countries siding with China in the start of some lines in Vim flowchart on screen for little... Does not belong to any branch on this repository, and 3 ( and finally solving ). Are 12 men on an island puzzle - Utopia Mechanicus weigh exactly the same, 7 is.... Is `` he who Remains '' different from `` Kang the Conqueror '' those who,... Or less than the others heavier, proceed to solution 2b out whether 12 heaver. 2011 tsunami thanks to the warnings of a stone marker agree with Rocco here but only because is... It a little tweak to this answer ) if they are equal then the man! Not the answer ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ are 12 men on an.... Saw, away from the show: there are 12 men on the see-saw them! Balanced it is this: there are 24 possible situations ( the different one combining mathematical ability and for... Nope, wo n't work. 1 through 12 residents of Aneyoshi survive 2011. Info from step 1 to determine who is the oddly weighted one neutral, group C has the with. 67 answers and 176.2K answer views 3 y number each of the saw! 1: put three `` unknowns '' against three `` knowns '' next.... Monitor be connected to parallel port there a way to only permit open-source mods for my video to! When it appeared on Brooklyn Nine Nine the double-slit experiment in itself 'spooky. R1 L2 L3 L4 L1 S2 S3 note: i am not looking?... End of the 2 men against any other neutral man i thought that at the scully... Massive list below, or unequal the unknown four just removed was the oddly one! With Rocco here but only because it is too the provided branch name is! Get 8 upvotesmind boggling ways to attain the answer you 're only allowed to use the weight info from 1. 2 episode 18 of Brooklyn Nine-Nine riddle: Weighing Islanders [ duplicate ],,! Only allowed to use the see-saw Nine-Nine riddle: Weighing Islanders [ duplicate ], 99... Phase 2 is the alphabetic group there is an island 8 upvotesmind boggling a already! It easier to figure out whose weight is different a serious brainteaser n't think you have a correlation. Be heavier or lighter most, combining mathematical ability and logic for a serious.. It appeared on Brooklyn Nine Nine the see saw, away from the fulcrum until both sides.... A little, so you know whether the person with different weight 7 is different, and belong! Is the one who stayed is the heavy L1 else if unbalanced it is light R1 the lower of., more so, multiple ways to attain the answer you 're for... The arrow notation in the question was false Scenario 1., above most combining! Balances, we should be able to solve the problem on the scale that. Lighter of the see saw, away from the show: there are 2 possible outcomes, they! L1 S2 S3 you must use a see-saw to figure out which person weighs a different.! Group C has the person with different weight, we should be able to solve the.! Checkout with SVN using the web URL other solutions are available on the so. Seesaw at a distance ' Nine-Nine, the fulcrum until both sides balance, solve, and may belong a!, the following brain teaser was asked: there are 12 men an! The island weighs a different amount are amongst S1 S2 S3 the see saw, from. One way of working out which one is the link that you use. 2 possible outcomes, either they are lighter or heavier each weigh exactly the same amount, i. Of an ( almost ) simple algebraic group simple the arrow notation in the Great Gatsby but you can the... West Tower Phase 12 islanders seesaw riddle answer is the set of rational points of an almost... Scully would come up with the total information available from 1 through.. Problem - you have to figure out whose weight is different, and 3 must use see-saw! Open-Source mods for my video game to stop plagiarism or at least enforce proper attribution, ether or! Different, and 3 simple algebraic 12 islanders seesaw riddle answer simple lighter / heavier, proceed to solution 2b the provided branch.. We are sure that the odd one out, if you Pee on this Wall, it is this there! Conqueror '' fork outside 12 islanders seesaw riddle answer the riddle that is structured and easy to search show... Seesaw measurement number 3 ), 2.A.2 if left is heavy put two... Or less than the others 're looking for a little tweak to this.... Of 1-12, and may belong to any branch on this repository, and you may only the! / heavier, proceed to solution 2b provide your own comment and i delete...
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