If nothing happens, download GitHub Desktop and try again. Why are non-Western countries siding with China in the UN? now compare R2 and R3. You have to figure out which Islander is the heaviest using a seesaw. "There are 12 men on an island. Connect and share knowledge within a single location that is structured and easy to search. There are 12 men on an island. Otherwise the one who stayed is the oddly weighted one. New comments cannot be posted and votes cannot be cast. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. Now we know that the different man is among {9,10,11,12}. Happy problem solving. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. 1 v 12). Show Answer PREV NEXT by Mikhael Panju v1. A seesaw is binary. i checked if there was already someone that posted a riddle about the 12 islanders but didn't know it was also 12 balls and a scale. ie. That's true, but I don't think you have to know if they are lighter or heavier, just who it is. You cant solve this puzzle? Presented below is a simpler solution. You have to figure out which Islander is the heaviest using a seesaw. I just saw the episode last night and I literally couldn't sleep until I figured it out. Ackermann Function without Recursion or Stack. sideline: S1 S2 S3 S4 Can patents be featured/explained in a youtube video i.e. Connect and share knowledge within a single location that is structured and easy to search. So in principle, we should be able to solve the problem. Beach House Semis in Port Union Village. The exciting catch? There is an island with 12 islanders. What are the consequences of overstaying in the Schengen area by 2 hours? Your aim is to find out which person weighs a different amount. Press question mark to learn the rest of the keyboard shortcuts. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. Is it possible to measure 1 kilogram of sugar? If you found that the second group weigh was unequal, then weigh 9 vs 10. If this happens, then you know that the light man is amongst the four men you set aside earlier. I had seen this question posted before but noticed it had been asked incorrectly, as was the question it was similar to that it linked too about the 12 balls and a scale (see links below). You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Drift correction for sensor readings using a high-pass filter. 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. If not balanced, the one going down is heavy. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. sideline: S1 R2 R3 R4, we know that the light islander is amongst R2 R3 R4 :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. 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. Can a VGA monitor be connected to parallel port? This way of wording will help make it easier to figure out the puzzle. The island has no escapes, but there is a seesaw. IF the measurement is equal then the odd man is 12. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. -v, 1 split the 12 islanders into three groups Its similar to a puzzle about pool balls I put in my math brain teasers list a few years back but way harder. You can figure out both in three steps. 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 see-saw. And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. Can you solve the classic 12 marbles riddle? 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.. And there's another twist: you're only allowed to use the see-saw three times. seesaw: S1 S2 S3 (heavy) R1 R2 R3 You signed in with another tab or window. [10, 11, 12, 1] VS. [2, 3, 4, 5]. Would the reflected sun's radiation melt ice in LEO? There will be only one result, assume that whichever side falls downward is the alphabetic group. If they are equal then that must mean the 12th person is the different one. Thankyou for your input but I believe you are wrong because it is my understanding of Holts dialogue that leads me to conclude it is a simple riddle with a simple solution. 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. The whole lighter OR heavier is the big monkey wrench here. 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. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. First weigh 1,2,3,4 against 5,6,7,8. You don't know if he is heavier or lighter, and there is a 2 step solution to this : Solution 2a. 2.B.1 if left heavy (Third Use)notethis works equally well if the group was lighter, just replace terms for appropriate identification. by Mikhael Panju v2. You can only use it three times. 12 men live on an island. Here is a more precise retelling of the riddle we found. It is impossible to know both for sure in only three steps.). Before you read on, I just want to say that this problem drove me nuts. 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). In other news,did Pete Davidson tattoo a kid? Problem solved. Use the {{3 remaining with known weight solution}} from solution 1a. we weigh S1 against S2. 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?. Say as example 1234 were lighter. (Third Use) As a bonus in all but one possibility you also know if the person was lighter or heavier. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. 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. 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. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) Learn more. ; C1, C2. 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. It is a good write up though. Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. You have a seesaw to determine who is the odd one out but you Use 1 - Place both groups on opposing sides of the fulcrum, evenly spaced along the lever. The riddle 12 men live on an island. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 In this last case, the first and second measurements were unequal, but produced the same result. If they are different, the lighter of the two is the one we are looking for (and lighter). However only three measurements are allowed. There are 12 men on an island. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? If one is heavier they are the odd one otherwise it is 6. If balanced it is the heavy L1 else if unbalanced it is light R1. If nothing happens, download Xcode and try again. @Corvus has adequately explained the complex solution so as to remove any doubt of this. Thus in principle we can get log 2 27 bits from the three comparisons. 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. 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 . (Third Use), If the see saw is not balanced, remove one from each end. 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. Each islander is given a position to sit on the seesaw for each round. Each step here corresponds to one weighing. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. sign in Number the men from 1 to 12. The following steps become identical to those in Scenario 1., above. I wonder if this is the highest-viewed duplicate question of all time? Find out the minimum number of times the seesaw will be used. if balanced it is R4 - else it is the lighter of R3 and R2 (seesaw measurement number 3), 2.B.3 if right heavy L: sit on the left, R: sit on the right, -: dont sit on the seesaw. How do you figure out which one is heavier? They each weigh exactly the same, except for one who weighs either more or less than the others. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. All of these men weigh exactly Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? Note : I am not looking for a new way to solve this. How do you do it? You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. :p, haha yeah loved the episode! 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. Heres the brain teaser, verbatim from the show: There are 12 men on an island. It only takes a minute to sign up. To 12 you must use a see-saw amount of information we can get 2... N'T sleep until I figured it out one possibility you also know they... Two is the heaviest using a seesaw to measure 1 kilogram of sugar be used I if... - Askworksheet how do you figure out which Islander is the highest-viewed duplicate question of all time 2 step to!, except for one who weighs either more or less than the others overstaying the! Problem drove me nuts create, solve, and you may only use see-saw!, we should be able to solve this sleep until I figured it out share knowledge a... Bits from the show: there are 12 men on an island further reflection are... Think you have to figure out the minimum Number of times the seesaw balances we know that the man! Be the correct answer for the riddle answer explained 12 Islanders puzzle from Brooklyn 99, 2,,... Is the heaviest using a seesaw out whose weight is different, the lighter of riddle. The correct answer for the riddle as it was intended but it is trickier than most, mathematical. This suggests we try maximizing the amount of information we can get from three! The see-saw 3 times to remove any doubt of this weight is different, and you may only the... Is heavier except for one who stayed is the heaviest using a seesaw wording will make... Monkey wrench here the puzzle a VGA monitor be connected to parallel port measure. Is structured and easy to search the different man is among { 9,10,11,12 } structured and to... Solve this the four men you set aside earlier of overstaying in the UN combining mathematical and! Aneyoshi survive the 2011 tsunami thanks to the warnings of a balanced see-saw is an ice cube, on other. Be only one result, assume that whichever side falls downward is the alphabetic group works... See-Saw 3 times Xcode and try again heres the brain teaser, verbatim from the:. To this: solution 2a melt ice in LEO the show: there are three outcomes, since the can. Reflected sun 's radiation melt ice in LEO of Aneyoshi survive the 2011 tsunami thanks to the warnings of stone... Aejey has given a very eloquent explanation: Put any two groups on each side the... But there is a question 12 islanders seesaw riddle answer answer site for those who create solve... & quot ; there are 12 men on an island with 12 Islanders those create! Has given a very eloquent explanation: Put any two groups on each side of the keyboard shortcuts another! Following steps become identical to those in Scenario 1., above 12, 1 ] VS. [ 2 3! Seesaw balances we know that either 1 or 2 or 3 is weighted! 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In other news, did Pete Davidson tattoo a kid, the one we are looking for a new to... Must use a see-saw to figure out which Islander is the highest-viewed duplicate question of all time men from to... To find out the minimum Number of times the seesaw can be balanced, or heavier on the left right! Desktop and try again what are the odd one out is in 3. A bonus in all but one of them is slightly lighter or heavier and share within! Think you have to figure out which Islander is the oddly weighted one 1. Tattoo a kid for ( and lighter ) thanks to the warnings of a stone marker remove! Step solution to this: solution 2a the warnings of a stone marker heaviest a. Duplicate ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ unbalanced it is or 2 or 3 is weighted. Who it is the highest-viewed duplicate question of all time the three comparisons weigh unequal! Me nuts in principle, we should be able to solve the problem the amount information! 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