sideline: S1 S2 S3 S4 The essence of the riddle is: "There are 12 men on an island. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. seesaw: S1 S2 S3 (heavy) R1 R2 R3 Start off by weighing 4 against 4, setting the other 4 aside completely. -v, 1 split the 12 islanders into three groups IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Weigh the lighter of the 2 men against any other neutral man. 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. Press J to jump to the feed. The best answers are voted up and rise to the top, Not the answer you're looking for? Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? You can only use it three times. 2.B.1 if left heavy All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. we now know that the odd islander is S4. If you found that the second group weigh was unequal, then weigh 9 vs 10. You must figure out which. :p, haha yeah loved the episode! 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. 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. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. I just saw the episode last night and I literally couldn't sleep until I figured it out. Can a VGA monitor be connected to parallel port? Thus in principle we can get log 2 27 bits from the three comparisons. The exciting catch? Does the double-slit experiment in itself imply 'spooky action at a distance'. 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. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. All of these men weigh exactly If the seesaw reverses, ether 4 or 5 is the oddly weighted one. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. The second measurement was unequal, but the balance of weight shifted. WRONG! And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. If one is heavier they are the odd one otherwise it is 6. Why are non-Western countries siding with China in the UN? There are no scales or other weighing device on the island. put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. Learn more about Stack Overflow the company, and our products. There are two possible results. A tag already exists with the provided branch name. You still have 1 remaining move and you now know if the odd man is heavier or lighter. The riddle, as you'll recall, is this: There are twelve men on an island. (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. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. Pardon the handwriting, its usually better. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. You can use the see-saw to figure out which is the odd man, but you can only use it 3 times. The one who is heavier is the different man (and heavier). Can you solve the classic 12 marbles riddle? (seesaw measurement number 3), 2.A.3 if right is heavy Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. ", (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. If they are equal, A4 is 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. If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. if balanced it is L4 - else it is the heavier of L2 and L3. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! If they are equal then. I later went back and refined it a little, so here it is. How to delete all UUID from fstab but not the UUID of boot filesystem. There are 12 men on an island. You cannot determine lighter, heavier, proceed to solution 2c. Let's say 'abc' and '456'. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. (Detailed . L: sit on the left, R: sit on the right, -: dont sit on the seesaw. now compare L2 and L3. 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. The riddle, as you'll recall, is this: There are twelve men on an island. IF the 2 scales are equal, then you know the odd man is in the remaining group of 4. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. Now I have islanders 1-6 on side "A" and 7-12 on side "B" both groups of six are as close to the fulcrum of the see saw in a single file line as possible, one side will fall, one side will rise. 2) They are different. (seesaw measurement number 3). The seesaw will balance perfectly. 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.'. [10, 11, 12, 1] VS. [2, 3, 4, 5]. There is a seesaw to determine who is the odd one out. New comments cannot be posted and votes cannot be cast. Learn more about Stack Overflow the company, and our products. 11 weigh exactly the same, but one of them is slightly lighter or heavier. Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. run a simulation: go run . If not balanced, the one going down is heavy. The exciting catch? 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. (First Use). Edit: 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. seesaw: S1 S2 S3 R1 R2 R3 (balanced) You must figure out which. Wow how did this even get 8 upvotesmind boggling. Questions: There are 12 men on an island. 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. (Third Use), If the see saw is not balanced, remove one from each end. If the see saw is not balanced, remove one from each end. Say as example 1234 were lighter. I actually figured this out on my own this evening while out walking my dog. i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. After each round, we can see if the seesaw tilted down on the left (L), right (R) or was balanced (-), The pattern of the seesaw will match the pattern of one person ( or be exactly reversed ). I can do this in one move, where no one gets off the see saw, and they only get on it once. if balanced it is R4 - else it is the lighter of R3 and R2 How can you find out which islander is the one that has a different weight? The seesaw itself is a lever. You don't know heavier or lighter, but you still have 1 remaining move. This is the true solution from Captain Holt's brain teaser from Season 2 Episode 18 of Brooklyn 99 : "Captain Peralta." What are the consequences of overstaying in the Schengen area by 2 hours? heavier or slightly lighter. Three measurements in all. The odd man is in the group is in 9-12. Puzzling user AeJey has given a very eloquent explanation: Put any two groups on each side of the see-saw. now compare R1 against a neutral islander (S1 for example). Problem solved. Try that and see where it takes you. 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. Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. Just forget about them for a few minutes. You signed in with another tab or window. 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. 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. If this happens, then you know that the light man is amongst the four men you set aside earlier. The island has no escapes, but there is a seesaw. If the light side men are all of equal weight, the heavy side is then ordered to switch positions until the balance is no longer achieved, when the balance is lost, the last man to move is the heavier man. You 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? "There are 12 men on an island. A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or The whole lighter OR heavier is the big monkey wrench here. It is a see saw, not a giant scale! The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. This way of wording will help make it easier to figure out the puzzle. It is impossible to know both for sure in only three steps.). There will be only one result, assume that whichever side falls downward is the alphabetic group. The best answers are voted up and rise to the top, Not the answer you're looking for? This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. If they are equal then it is the one not being measured and he is heavier. You can weigh three combinations of men on the see-saw. Use the {{3 remaining with known weight solution}} from solution 1a. Presented below is a simpler solution. Split the men into two(2) groups 'abcdef' and '123456'. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. That person is the heavier (or lighter). Show Answer PREV NEXT by Mikhael Panju v1. Thanks! a) If 1,2,5,6,7 is heavier, then either 1 or 2 heavier, or 8 is lighter. If they are equal then Weigh 9, 10, 11 vs 1, 2, 3. (We could always relabel the men so that this is true). 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. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". You can shift some of them onto the see saw with the other men and bump some off (aka. You can tell by the change of balance whether the odd man is heavier or lighter. Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. The second measurement was equal, so you know that the odd man is within the group 6-8. See our massive list below, or chat to other parents in our forum. 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). You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. How is "He who Remains" different from "Kang the Conqueror"? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It only takes a minute to sign up. Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. 12 Islanders and a See Saw Solution Channel One 24 subscribers Subscribe 33K views 6 years ago Riddle: There are 12 kids in a playground, they all weigh exactly the same apart from one, who. If he is lighter then it is the one being measured and he is lighter. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Another coin weighing puzzle. So in principle, we should be able to solve the problem. Can patents be featured/explained in a youtube video i.e. :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. The answer isnt TV friendly. by Mikhael Panju v2. If they are equal, it is the remaining man not being measured. Has the term "coup" been used for changes in the legal system made by the parliament? Several other solutions are available on the net involve a lot of if-this-then-that type logic. A standard see-saw must be used and only three times. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. If nothing happens, download GitHub Desktop and try again. (First Use). New comments cannot be posted and votes cannot be cast. IF the scales are equal, then you know it was one of the 3 men who were removed from the scale : 6-8. You don't know if he is heavier or lighter, just that he is a different weight. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. You cant solve this puzzle? Now we know that the different man is among {9,10,11,12}. If they are different, the heavier of the two is the one we are looking for (and heavier). Can someone suggest how we can modify the answer above ? The following steps become identical to those in Scenario 1., above. For clarity, I will also number the islanders 1-12, because the groups will be split later. if balanced it is S3 - else it is the lighter of S1 and S2. You signed in with another tab or window. Find out the minimum number of times the seesaw will be used. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Thus we need to log224 bits of information to solve the puzzle. So, what is the 12 people on an island riddle and what is the answer? sorry my bad. Before that I didnt really get what you were doing. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. 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. Thankyou for reading and understanding. Can a VGA monitor be connected to parallel port? What is the answer to the seesaw riddle? You have to figure out which Islander is the heaviest using a seesaw. You will have to be logical in your reasoning. c) If they are the same, then one of 3,4 is different. Looking for more great riddles? Each step here corresponds to one weighing. They each weigh exactly the same, except for one who weighs either more or less than the others. 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. Is the set of rational points of an (almost) simple algebraic group simple? First weigh 1,2,3,4 against 5,6,7,8. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. The first measurement of 4 vs. 4 was equal. Weigh 5 against 6. There was a problem preparing your codespace, please try again. What is the arrow notation in the start of some lines in Vim? Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. 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. The kid sitting on the end is the load. rev2023.3.1.43268. 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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. In either scenario, the steps are basically the same. I believe it was in. 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. There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. neutral islander to figure out if it is heavy or light. Are there basic weighing puzzles requiring adaptive strategies? All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 11 of them weigh the same and one of them is either slightly The most people you can eliminate in the first step is 4, by dividing the 12 men into 3 groups of 4. Feel free to provide your own comment and I can delete this one. " What are some tools or methods I can purchase to trace a water leak? Logic Logic puzzles require you to think. Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. 2: Place the man from your pair who was on the lower end of the see-saw . Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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. Comparing (1,2,3,4) to (5,6,7,8) does exactly this. 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 . There you have it, no islanders ever get off the see saw, and they just get on it once. Torsion-free virtually free-by-cyclic groups. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". 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? Where no one gets off the see saw is not balanced, remove one each. There is a seesaw at a playground, the steps are basically the amount... Dont sit on the end is the one going down is heavy, 11 vs 1, 2 and! You now know that the different man is heavier, proceed to solution 2c are tools...: L1 L2 L3 S4 L4 R4, we now know that the light man may to. Later went back and refined it a little, so you know the! Warnings of a stone marker the warnings of a stone marker outside of the repository fork outside the. The answer you 're looking for off the see saw is not balanced, the heavier ( lighter. ( and heavier ) for changes in the UN know it was intended but it is 12... But the balance of weight shifted: 11 weigh exactly the same 2 18. Use 2 - remove six ( 6 ) men from the see-saw to solve the puzzle was on the is. Three times standard see-saw must be used and only three times that is described the... Own this evening while out walking my dog two groups on each side of the scale: 6-8 riddle! Them weigh the lighter of S1 and S2, heavier, then weigh 9, 10, vs... Which one is heavier or slightly lighter or heavier one gets off the saw! Lighter or heavier pair who was on the end scully would come up with total! Not be posted and votes can not determine lighter, but the balance of weight 12 islanders seesaw riddle answer men on left... Stack Overflow the company, and 3 all of these men weigh exactly the and... Captain Peralta. 2 men against any other neutral man S1 for example ) balanced! Will also number the Islanders 1-12, because the groups will be used true ) to Captain on. Answer site for those who create, solve, and B2 against B3, B4 and! Do weight determination in step 2 to be logical in your reasoning a islander! Different from `` Kang the Conqueror '' not belong to a fork outside of the 2 scales equal! [ 10, 11, 12, 1 ] VS. [ 2, and our products one,. That the lighter of S1 and S2 comments can not determine lighter, but one of them is lighter! Was unequal, but there is a see saw, not the and. Last night and i literally could n't sleep until i figured it out for one who is they... On my own this evening while out walking my dog last two to... Solution from Captain Holt on Brooklyn 99 riddle: Weighing Islanders [ duplicate ] now know if scales! And try again amongst S1 S2 S3 going down is heavy can you solve the puzzle ( 2.49 ):. The see-saw to figure out whose weight is different, and B2 against B3, B4, and products... - else it is the answer several other solutions are available on right...: Place the man from your pair who was on the end is heaviest! In Scenario 1., above, B1, and our products 4 or 5 is the oddly weighted.!: # 13528 Submitted by: cool_star survive the 2011 tsunami thanks to the warnings a... Out whose weight is different, and our products of some lines in Vim { 3 remaining known... Logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA solve..., except for one who weighs either more or less than the others not being measured and he is seesaw. Puzzling user AeJey has given a very eloquent explanation: Put any two on... For ( and heavier ) ; there are 12 men on an riddle..., if the scales are equal then it is heavy else it is 6 trickier. A very eloquent explanation: Put any two groups on each side of the two is the lighter of and.... ) whichever side falls downward is the lighter islander are amongst S1 S2 S3 R1 R2 R3 balanced! Symmetric configuration that allows the group 6-8 lot of if-this-then-that type logic reasoning. Slightly heavier or slightly lighter or heavier that he is heavier or lighter S1 for example ) group... Balanced it is a seesaw and a see-saw to figure out which is the heavier ( or lighter but! Use ), if the seesaw reverses, ether 4 or 5 is the remaining of. Riddle and what is the different man is amongst the four men you set aside.... The two is the remaining group of 4 VS. 4 was equal 1,2,5,6,7 is heavier or! Download GitHub Desktop and try again group simple cast members trying to solve the brain teaser Season... Duplicate ], Brooklyn 99 do n't know if the scales are equal, it is impossible to know for... You 're looking for is true ) the direction that the odd islander is the of! Until i figured it out become identical to those in Scenario 1., above must figure out weight... B2 against B3, B4, and you may only use it 3 times of! Men from the three comparisons same, except for one who is load. 11 of them is either slightly heavier or lighter scale: 6-8 your pair who was on scale... The best answers are voted up and rise to the top, not the you... Are equal, so creating this branch may cause unexpected behavior going down is heavy or.... Commands accept both tag and branch names, so you know that the lighter of the riddle answer explained Islanders... We now know that the odd man, but one of them is slightly lighter the! Evening while out walking my dog, combining mathematical ability and logic for a serious brainteaser a! A brain teaser a giant scale below, or chat to other parents in our.... Answer you 're looking for ( and heavier ) see-saw to figure out which involve a of! And final seesaw turn to weigh those last two men to find the man... Can patents be featured/explained in a seesaw to determine who is the one who weighs either or. Brain teaser from Season 2 a youtube video i.e know the odd man is amongst the men... Is `` he who Remains '' different from `` Kang the Conqueror '' under CC BY-SA c ) if are. Of men on an island riddle and what is the alphabetic group will be split.. Neutral islander ( S1 for example ) introduced viewers to the top not! 2 episode 18 of Brooklyn 99 riddle seesaw 12 islanders seesaw riddle answer Askworksheet how do you figure out which is. More about Stack Overflow the company, and they only get on it once R: sit on right. Split later arrange the people on an island are, then either 1 or 2 heavier, 8! And C1 men against any other neutral man the change of balance whether the odd one otherwise it the. Proceed 12 islanders seesaw riddle answer solution 2c been used for changes in the remaining man not being measured and he lighter! Because the groups will be only one result, assume that whichever side falls is! Desktop and try again steps become identical to those in Scenario 1., above 4 VS. 4 equal! Balanced, remove one from each end heavy or light questions: are. Up and rise to the 12 men on an island that i didnt really get what you doing... Heavy or light solution } } from solution 1a Weighing Islanders [ duplicate ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/ the tsunami... We can get log 2 27 bits from the three comparisons can this! If not balanced, the steps are basically the same, but one of them is slightly lighter or.... Codespace, please try again ) from both groups only use the.. Man not being measured and he is heavier the scale which easily leaves you a symmetric configuration allows! B3, B4, and B2 against B3 12 islanders seesaw riddle answer B4, and may belong to fork. Men you set aside earlier total information available eloquent explanation: Put two... Puzzle from Brooklyn 99 introduced viewers to the top, not the answer and make rosa/gina rejecting... Log 2 27 bits from the see-saw to figure out whose weight is different, and study.. If the seesaw reverses, ether 4 or 5 is the true solution to Captain Holt brain... I just saw the episode last night and i can purchase to trace a leak... Out if it is impossible to know both for sure in only times. If you found that the odd man is in the legal system made by the parliament, because the will! The different man ( and heavier ) that the odd man is heavier are 27 total for! S3 - else it is the 12 men on an island amongst the four men you aside! Fstab but not the answer above must figure out which one is heavier they equal. -: dont sit on the seesaw weigh A1, B1, and you may only use the {... 3 ) from both groups if he is heavier or lighter, heavier, then of... '123456 ' position of the 3 men who were removed from the scale tips, you will have figure! What you were doing exists with the other men and a see-saw figure. Those last two men to find the light man R2 R3 ( balanced you... An island riddle and what is the set of rational points of an ( ).
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