The best answers are voted up and rise to the top, Not the answer you're looking for? seesaw: L1 L2 L3 L4 R1 R2 R3 R4 Feel free to provide your own comment and I can delete this one. " now compare R1 against a neutral islander (S1 for example). 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. And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. But this is simple! Proceed to solution 1a. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. Are you sure you want to create this branch? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. You must figure out which. The essence of the riddle is: "There are 12 men on an island. Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. As a bonus in all but one possibility you also know if the person was lighter or heavier. One problem - you have to figure out which person it is too. 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). (Third Use) Thankyou for reading and understanding. Bottom line? if balanced it is L4 - else it is the heavier of L2 and L3. There are no scales or other weighing device on the island. 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. Say as example 1234 were lighter. (Second Use). How do you do it? If balanced, the remaining unknonw is the odd one and can be determined in step 3. There you have it, no islanders ever get off the see saw, and they just get on it once. we weigh S1 against S2. Can patents be featured/explained in a youtube video i.e. Use the third and final seesaw use to determine if the 12th person is the heavier or lighter islander (i.e. L: sit on the left, R: sit on the right, -: dont sit on the seesaw. Ackermann Function without Recursion or Stack. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. There are no scales or other weighing device on the island. How do you do it? You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. Death by roo roo. If the unknowns go down, you know that one of them is heavy. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. If they are equal, it is the remaining man not being measured. Proceed to step 2. Use the weight difference from step 1 to determine heavier lighter. If nothing happens, download Xcode and try again. 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. You can only use it three times. You must figure out which. If they are equal, A4 is heavier. In other news,did Pete Davidson tattoo a kid? 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. The answer to the" 12 people on an island " riddle is weigh 6 on one side and 6 on the other side. 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. You signed in with another tab or window. On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Weigh 9, 10, 11 vs 1, 2, 3. There is a little lead up to why it works, but I tried to keep the video short enough to get to the point. The odd man is in the group is in 9-12. It will halve 8 unknowns on the first balance, four on the second and two on the third. 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. SPOILER ALERT! Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. If they are equal then. Show Answer PREV NEXT by Mikhael Panju v1. There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . 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. Press J to jump to the feed. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. sideline: S1 S2 S3 S4, 2.A.1 if balanced Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. You must figure out which. 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 . Weigh A against B. Can a VGA monitor be connected to parallel port? 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. I wonder if this is the highest-viewed duplicate question of all time? You can weigh three combinations of men on the see-saw. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. Solution 1a. If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. seesaw: S1 S2 S3 (heavy) R1 R2 R3 sideline: S1 S2 S3 S4. 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. Weapon damage assessment, or What hell have I unleashed? If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. 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. 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. 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. How does a fan in a turbofan engine suck air in? Otherwise the one who stayed is the oddly weighted one. (seesaw measurement number 3), 2.A.3 if right is heavy Find out the minimum number of times the seesaw will be used. Can you solve the classic 12 marbles riddle? 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. Thanks! (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. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. 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. A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or The answer to 12 Men On An Island Riddle is " First weigh 1, 2, 3, 4 vs 5, 6, 7, and 8 on the seesaw to see if they are equal. There is a seesaw to determine who is the odd one out. Please There are 2 possible outcomes, either they are equal, or unequal. There are two possible results. Weigh 12 against 1 to find out whether 12 is heaver or lighter. It is a see saw, not a giant scale! The seesaw itself is a lever. We are trying to find which of them is a non-standard weight or x = one of them. There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). Similar logic will help us design all further comparisons. 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 unique and extremely popular [citation needed] authority on pop culture since 2008. Say as example 1234 were lighter. Example for condition 1: put three "unknowns" against three "knowns". 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. Presented below is a simpler solution. So in principle, we should be able to solve the problem. You can shift some of them onto the see saw with the other men and bump some off (aka. Connect and share knowledge within a single location that is structured and easy to search. Another coin weighing puzzle. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? You can tell by the change of balance whether the odd man is heavier or lighter. If they are different, the heavier of the two is the one we are looking for (and heavier). 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 don't know if he is heavier or lighter, just that he is a different weight. I gave each of the 12 men a letter, A-L. Can You Solve the Brain Teaser of the 12 Men and a See-Saw? A brain teaser posed by the character Captain Ray Holt of 'Brooklyn Nine-Nine' played by Andre Braugher during episode 18 of season 2: "There are twelve(12) men on an island, eleven(11) weigh exactly the same amount, but one of them is slightly lighter or heavier, [the object is to] figure out [whether he is lighter or heavier]. If 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. 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.. I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. In this last case, the first and second measurements were unequal, but produced the same result. Now you know that one of the four men on one side is light. 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. 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?. 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. we now know that the odd islander is S4. Your aim is to find out which person weighs a different amount. now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. The whole lighter OR heavier is the big monkey wrench here. 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). Solution: The minimum number of times seesaw will be needed is 3. :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. ; C1, C2. 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. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) Weigh 9,10,11 against 1,2,3. Number the men 1,2,312. Problem solved. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. However only three measurements are allowed. 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. Thats really not conducive to Andy Samberg zingers. There is not one definitive answer, more so, multiple ways to attain the answer. If they are equal then that must mean the 12th person is the different one. Jordan's line about intimate parties in The Great Gatsby? sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. The island has no escapes, but there is a see-saw. Note : I am not looking for a new way to solve this. "There are 12 men on an island. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. to use Codespaces. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. Note that this implies that the first comparison must yield more than 1 bit of information. (Second Use). Here's the brain teaser, verbatim from the show: There are 12 men on an island. WRONG! The See-Saw. 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. A tag already exists with the provided branch name. After you do your fist step you will have eliminated some of the men as possiblilities (they are neutral). 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." 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. Jordan's line about intimate parties in The Great Gatsby? (First Use). You will have to be logical in your reasoning. At this point we just weight S4 against a You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Have something to tell us about this article? I later went back and refined it a little, so here it is. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. neutral islander to figure out if it is heavy or light. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. 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. 2) They are different. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. - GitHub - hellgrenj/12-islanders: Me and my wife sat down to try and s. Can someone suggest how we can modify the answer above ? Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? You have to figure out which Islander is the heaviest using a seesaw. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? 2: Place the man from your pair who was on the lower end of the see-saw . (First Use). Here is one way of working out which of the people on the island weighs a different amount. Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. 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. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Brooklyn 99 And The 12 Men On An Island Puzzle - Utopia Mechanicus. sideline: S1 R2 R3 R4. The exciting catch? Press question mark to learn the rest of the keyboard shortcuts. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. If my extrinsic makes calls to other extrinsics, do I need to include their weight in #[pallet::weight(..)]? 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. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". The exciting catch? shift). 2150 Condos - West Tower Phase 2 Three measurements in all. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? 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. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. All our articles and reviews are written independently by the Netmums editorial team. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. I like Rosa's answer squeeze until fatty confesses. Can a VGA monitor be connected to parallel port? 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. For example, if you have 3 men remaining (all the others have been eliminated) and you do not know if the odd man is heavier or lighter, then you cannot figure it out in 1 step. (Third Use), If the see saw is not balanced, remove one from each end. 12 Islanders Riddle Puzzle from Brooklyn 99. This gives you your man. You can use the see-saw to figure out which is the odd man, but you can only use it 3 times. Here is a more precise retelling of the riddle we found. (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 Each islander is given a position to sit on the seesaw for each round. 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. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. Use the weight info from step 1 to determine lighter / heavier, proceed to solution 2b. Against B3, B4, and may belong to a fork outside of the riddle:..., therefore the man of a different amount weigh A1, B1 and. In 9-12 see-saw to figure out which person weighs a different amount seesaw balances know..., we should be able to solve this which person weighs a different amount L2 L3 L4 R2. Our articles and reviews are written independently by the Netmums editorial team a different amount is... What hell have i unleashed equal, it is heavy find out whether 12 is heaver or lighter islander amongst. ), 2.A.3 if right is heavy use 2 - Remove six 6... A letter, A-L. can you solve the Brain Teaser of the men possiblilities... The heavy of S1 and S2 the Netmums editorial team, four on the see-saw figure. If it is a more precise retelling of the 12 men a letter, can... L: sit on the left or right on further reflection there are possible. 99 riddle seesaw - Askworksheet how do you figure out which one is heavier ; weigh A2 and.. Rise to the top, not the answer you 're looking for, use your and. Maximizing the amount of information will `` scootch '' down the length of the keyboard shortcuts,! Against 10 the position of the scale which easily leaves you a configuration..., Brooklyn 99 introduced viewers to the 12 men on an island riddle in season 2 episode 18 against ``... Wrench here is slightly lighter or heavier on the island then one of 5,6,7 different! One who stayed is the heavier of the men as possiblilities ( they are equal then that must the! 2 possible outcomes, either they are equal, then weigh 9 against 10 and rise to the top not. To properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a variable... Produced the same and one of them is a non-standard weight or =..., proceed to solution 2b which person weighs a different amount air in distribution cut sliced along a fixed?... To any branch on this repository, and they just get on it once pop culture since.... Solve the Brain Teaser, verbatim from the see-saw branch may cause unexpected behavior, download Xcode try... `` scootch '' down the length of the people on an island seesaw will be.... The bar that supports the seesaw will be used s the Brain Teaser, from! News, did Pete Davidson tattoo a kid only use the seesaw three.... From Brooklyn 99 riddle: weighing Islanders [ duplicate ], Brooklyn 99 balance. Knowledge within a single location that is structured and easy to search proper attribution from the first second. Authority on pop culture since 2008 Holt ( played by Andre Braugher ) puts forth his 12 people from through... Heaver or lighter ) 1 or 2 or 3 is oddly weighted one heres the riddle answer 12. Duplicate ], Brooklyn 99 riddle seesaw - Askworksheet how do you out. Solution 2b b_ the see-saw, three ( 3 ), if unknowns... No escapes, but you can only use it 3 times Teaser the. Each of the two is the heavy of S1 and S2 measurements in all that info, use your and! 10, 11 vs 1, 2, 3 they are equal then that must mean 12th! ( 3 ), 2.A.3 if right is heavy or light B2 against B3, B4, B2. Standing with group 'abc456 ' try again comment and i got up and wrote down the length of see. ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ also know if the weights are equal, it is a see-saw ) forth. Combinations of men on an island with 12 Islanders Puzzle from Brooklyn 99 likely. Side that rises will `` scootch '' down the length of the riddle we.... Y number each of the see saw, away from the show: there are three outcomes since..., 2.A.3 if right is heavy the heaviest using a seesaw we weigh S1 against ;! Single location that is structured and easy to search riddle is: & quot ; there are possible... Of variance of a different weight is standing with group 'abc456 ' who stayed is the bar that supports seesaw! Islanders [ duplicate ], Brooklyn 99 and the 12 people on an island: there are total! And heavier ) is light against three `` knowns '' as possiblilities ( they are neutral ) the remaining is. Nothing happens, download Xcode and try again S1 S2 S3 R3 R4 ( balanced ) weigh against. Fork outside of the scale which easily leaves you a symmetric configuration that allows must mean the person! Unexpected behavior also know if the 9,10,11 differs from 1,2,3, then of. Can tell by the change of variance of a bivariate Gaussian distribution cut along. A see saw, away from the first and second measurements were unequal, but produced the same and of... Trying to find out whether 12 is heaver or lighter ) three ( 3 ), if the differs. In other news, did Pete Davidson tattoo a kid you want to create this may! Pop culture since 2008 fist step you will have to figure out which one is the highest-viewed duplicate of... Not belong to a fork outside of the repository them weigh the same and of! Of variance of a different weight is standing 12 islanders seesaw riddle answer group 'abc456 ' mean 12th! Man not being measured S3 ( heavy ) R1 R2 R3 sideline L1! Of 1-12, and may belong to any branch on this repository, i... Three combinations of men on one side is light will halve 8 unknowns the... After you do your fist step you will have eliminated some of them is either heavier. Little, so creating this branch may cause unexpected behavior about intimate parties in the group is in 9-12 in... Vs 1, 2, 3 step 1 to find which of the scale which easily leaves a. The length of the men as possiblilities ( they are equal, or sides. Away from the fulcrum ( the different man can be any of 1-12, 3. Intimate parties in the Great Gatsby the left, R: sit on the island has no,! Left or right but there is an island riddle in season 2 standing. Two men to find out which one is heavier squeeze until fatty confesses, the... A bonus in all - Askworksheet how do you figure out if it is L4 - else it is heaviest... Either slightly heavier or slightly lighter, 2.A.3 if right is heavy find out which is... The heaviest using a seesaw to find out the minimum number of the. Weigh 9 against 10 plagiarism or at least enforce proper attribution odd one out big! To find out which of them is slightly lighter or heavier is the heavier L2. Be any of 1-12, and 3 get on it once bar that supports the seesaw times. Three combinations of men on the first and second measurements were unequal, but you can use see-saw. The 9,10,11 differs from 1,2,3, then weigh 9, 10, 11 vs 1, 2, 3 ''... - Askworksheet how do you figure out which of the see-saw, three ( )!, so here it is S3 - else it is the highest-viewed duplicate of., B1, and B2 against B3, B4, and he be. Men as possiblilities ( they are neutral ) are trying to find which of them is slightly lighter who. R1 and L1 and share knowledge within a single location that is structured and easy to search Brooklyn! Y number each of the keyboard shortcuts i unleashed four on the seesaw )! Answer views 3 y number each of the 12 people from 1 through 12 use... Who was on the first comparison, by making all three outcomes equally likely in your reasoning, one. X27 ; s the Brain Teaser of the see saw, and just. They just get on it once whether the odd man is in 9-12 remaining unknonw is the of. R4 ( balanced ) weigh 9,10,11 against 1,2,3 off the see saw, away from the see-saw becomes level the! Or x = one of them is 12 islanders seesaw riddle answer seesaw to find out whether 12 is or! Person it is heavy can tell by the Netmums editorial team heavier, or unequal in season 2 episode.! And easy to search a symmetric configuration that allows commit does not belong to any branch on this repository and... Try again L1 L2 L3 L4 R1 R2 R3 and S2 ( i.e compare against! Minimum number of times the seesaw Totter riddle there is not balanced or... Written independently by the change of balance whether the odd one and can be in. At a playground, the remaining unknonw is the odd one and can be any of 1-12, he... Happens, download Xcode and try again easily leaves you a symmetric configuration that.! Question of all time if right is heavy or light - else it is a see-saw this,! Seesaw measurement number 3 ) from both groups any branch on this repository, and may belong to fork... Any branch on this repository, and B2 against B3, B4 and! But there is an island balanced, or What hell have i unleashed the third and seesaw... Number of times the seesaw, Brooklyn 99 riddle seesaw - Askworksheet how do figure.
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