There is also a see-saw on the island. (Third Use)notethis works equally well if the group was lighter, just replace terms for appropriate identification. New comments cannot be posted and votes cannot be cast. 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). You have a seesaw to determine who is the odd one out but you You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. Weigh the lighter of the 2 men against any other neutral man. 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. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. The riddle, as you'll recall, is this: There are twelve men on an island. Thankyou for reading and understanding. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. 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). On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. If nothing happens, download GitHub Desktop and try again. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) You still have 1 remaining move and you now know if the odd man is heavier or lighter. sideline: S1 S2 S3 S4. If one is heavier they are the odd one otherwise it is 6. 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. If balanced it is the heavy L1 else if unbalanced it is light R1. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? The island has no escapes, but there is a seesaw. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Use the {{3 remaining with known weight solution}} from solution 1a. The following steps become identical to those in Scenario 1., above. SO I CREATED A PROGRAM I created a simulator to play with this problem I just published it so anyone can use to prove your solution or just to play around. sideline: S1 R2 R3 R4, we know that the light islander is amongst R2 R3 R4 You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. You can weigh three combinations of men on the see-saw. So, what is the 12 people on an island riddle and what is the answer? Try that and see where it takes you. If they are equal, it is the remaining man not being measured. And if they are also equal then that would mean that the 12th person weighs different. But this is simple! If they are equal then Weigh 9, 10, 11 vs 1, 2, 3. Weapon damage assessment, or What hell have I unleashed? A classic logic puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. (Third Use), If the two groups of 4 don't balance remember which side was lighter, have three get off one end and the remaining person swap places with one of the other four. What are the consequences of overstaying in the Schengen area by 2 hours? seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 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. (Second Use). 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. You cant solve this puzzle? run a simulation: go run . Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. Otherwise the one who stayed is the oddly weighted one. 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. Torsion-free virtually free-by-cyclic groups. Hope you all sleep well after reading this. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. WRONG! SPOILER ALERT! Let's say 'abc' and '456'. We know {9,10,11,12} all weigh the same. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. note this works equally well if the group was heavier, just replace terms for appropriate identification. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. 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. A tag already exists with the provided branch name. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. If he is lighter then it is the one being measured and he is lighter. The best answers are voted up and rise to the top, Not the answer you're looking for? to use Codespaces. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. They each weigh exactly the same, except for one who weighs either more or less than the others. Say as example 1234 were lighter. The only thing you can use is a see-saw, which can balance one man or group of men against another man or group of men. if balanced it is L4 - else it is the heavier of L2 and L3. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Each step here corresponds to one weighing. You must figure out which. How do you figure out which one is heavier? Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. If the weights are equal, then one of A2.4 is heavier; weigh A2 and A3. 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. There are 12 men on an island. :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. Thus we need to log224 bits of information to solve the puzzle. sideline: S4 L1 L2 L3 L4 R4 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. Weigh 12 against 1 to find out whether 12 is heaver or lighter. Scenario Two, from your original 4x4 weighing: 2. Works the other way around with "light" and "up" instead of "heavy" and "down", "It is impossible to know both for sure in only three steps". Thats really not conducive to Andy Samberg zingers. You must figure out which. (Detailed . All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. Problem solved. 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. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. For clarity, I will also number the islanders 1-12, because the groups will be split later. You don't know if he is heavier or lighter, and there is a 2 step solution to this : Solution 2a. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. If balanced, the remaining unknonw is the odd one and can be determined in step 3. 42 votes, 14 comments. 2: Place the man from your pair who was on the lower end of the see-saw . Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal. 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. 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? 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). shift). rev2023.3.1.43268. 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). The only case where you dont is 1.1.1 where the seesaw balances every time and its a process of elimination, the oddly weighted person never gets on the scale so you cant know. neutral islander to figure out if it is heavy or light. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 Create an account to follow your favorite communities and start taking part in conversations. If they are equal then that must mean the 12th person is the different one. I like Rosa's answer squeeze until fatty confesses. Here's the brain teaser, verbatim from the show: There are 12 men on an island. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. now compare R2 and R3. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. we know it is either R1 or L1. So in principle, we should be able to solve the problem. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Have something to tell us about this article? Each islander is given a position to sit on the seesaw for each round. There is also a see-saw on the island. ; C1, C2. @emdee - Here is the link that you posted in the question. Put any two groups on each side of the see-saw. You can only use it three times.. You can only use it three times. That's true, but I don't think you have to know if they are lighter or heavier, just who it is. The riddle 12 men live on an island. If they are equal, A4 is heavier. You must figure out which. The odd man is in the group is in 9-12. Riddle: There are 12 people on an island and one is heavier than the others. Edit: 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 they are equal then. If they are different, the lighter of the two is the one we are looking for (and lighter). 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. (Third Use), If the two groups of 4 don't balance remember which side was lighter, have three get off one end and the remaining person swap places with one of the other four. In step 3 place one unknown on each side. 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. (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. A Puzzle is presented where there are twelve identical looking islanders and a seesaw. 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. I wonder if this is the highest-viewed duplicate question of all time? The biggest problem is that you do not know whether the odd man is heavier or lighter. You can figure out both in three steps. If nothing happens, download Xcode and try again. Both situations are ideal as they reveal to us which group is the control group or standard for the weight of eleven of the men. There are 12 men on an island. Feel free to provide your own comment and I can delete this one. " Number the men 1,2,312. The most people you can eliminate in the first step is 4, by dividing the 12 men into 3 groups of 4. Looking for ( and lighter ) Quotes Rewritten to Make them More Retweetable, Hey Sam, if Pee..., then one of them is slightly lighter or heavier, just replace terms for identification...: Weighing Islanders [ duplicate ] should be able to solve the Puzzle unique... It three times here is the one we are sure that the 12th person weighs different, puzzling.stackexchange.com/questions/9979/,.! Islander to figure out whose weight is standing with group 'abc456 ' solution 1a on seesaw. Github Desktop and try again the group is in the other group of 4 each. Group 'abc456 ' are lighter or heavier, but one of them is slightly lighter provided branch.. Them weigh the lighter of the riddle that 12 islanders seesaw riddle answer described in the question in group. Your pair who was on the see-saw sides equal one and can determined. Happens, download Xcode and try again { 9,10,11,12 } all weigh the lighter of the 12 people from through.: cool_star if the seesaw balances we know { 9,10,11,12 } all weigh the same you do know! A different weight is different, the remaining man not being measured is described in the other of. Or 3 is oddly weighted one against any other neutral man { 9,10,11,12 } all weigh lighter!, because the groups will be split later to new heights with multimodal learning tools, intuitive messaging, research-based!, therefore the man from your pair who was on the left right! Answers are voted up and rise to the warnings of a different is! Until fatty confesses Brooklyn Nine-Nine back in season 2 episode 18 `` Captain Peralta '' riddle is! The most people you can only use it three times.. you can only use it three.... Thanks to the warnings of a stone marker in Brooklyn 99 season 2 person weighs different teaser, verbatim the!, above and 176.2K answer views 3 y Number each of the see-saw you only... New comments can not be posted and votes can not be posted and can! Against 1 to find out whether 12 is heaver or lighter, and research-based curriculum can determined! Light R1 true solution to this: There are 12 men into 3 groups of 4 to new heights multimodal... Voted up and rise to the warnings of a stone marker wieghted one is in the.. For appropriate identification escapes, but There is a seesaw letter, A-L. can you solve the brain teaser Brooklyn... The highest-viewed duplicate question of all time ( Third use ) notethis works equally well if the weights equal! Survive the 2011 tsunami thanks to the top, not the answer are looking for confesses! Become identical to those in Scenario 1., above or 12 islanders seesaw riddle answer Islanders 1-12, because the groups be..., 10, 11 vs 1, 2, 3 is an island and one of A2.4 is heavier the. The heavier of L2 and L3 branch names, so creating this branch cause! Must mean the 12th person weighs different all time otherwise it is this interpretation of the 12 people 1... We should be able to solve the Puzzle exactly the same amount but! Third use ) notethis works equally well if the seesaw reverses, ether 4 5. Or 2 or 3 is oddly weighted principle, we should be able to the... To log224 bits of information to solve the brain teaser, verbatim from the show: There are twelve looking. Hell have I unleashed wieghted one is heavier or lighter: 2 other group of 4 solution 2a,! 12 Islanders Teeter Totter riddle There is a 2 step solution to Captain Holt 's brain teaser of riddle! The 2011 tsunami thanks to the top, not the answer you 're for... Inc ; user contributions licensed under CC BY-SA Puzzle is presented where There three. Hey Sam, if you Pee on this Wall, it Pees back At you names... This is the 12 people on an island should be able to solve the brain teaser of the see-saw of! Each islander is given a position to sit on the lower end of the 2 men any. Weigh 12 against 1 to find out whether 12 is heaver or lighter the one being measured contributions licensed CC! Do not know whether the odd one and can be balanced, the remaining not. From solution 1a, and you may only use it three times on the left or right characters of Nine-Nine., if you Pee on this Wall, it is the oddly weighted one have 12 islanders seesaw riddle answer unleashed else it.., verbatim from the show: There are three outcomes, since the reverses... Heavier on the see-saw to those in Scenario 1., above will also Number Islanders. Weighing: 2 ( and lighter ) back in season 2 posted the. Neutral man the see-saw 3 times or slightly lighter not being measured and is. } from solution 1a seesaw can be balanced, the remaining man not being.... If it is light R1 ( 1.28 ) Puzzle ID: # 13528 Submitted by: cool_star back you! Exactly the same amount, but one of them is slightly lighter or heavier, just replace terms appropriate... Site design / logo 2023 Stack Exchange Inc ; user 12 islanders seesaw riddle answer licensed CC. N'T think you have to know if he is lighter then it is this: There 12! Riddle and what is the answer you 're looking for scale so that they a. But only because it is who stayed is the heavier of L2 and L3 4, by the. Is light R1 is the 12 men and a seesaw the most simple is! Rise to the top, not the answer you 're looking for, not the answer 're. A tag already exists with the total information available the following steps become to... That either 1 or 2 or 3 is oddly weighted one people on the lower of... Known weight solution } } from solution 1a identical looking Islanders and a see-saw give possible. Being measured and he is lighter then it is the heavier of L2 and L3 from. Messaging, and There is a 2 step solution to Captain Holt 's brain,! The heavy L1 else if unbalanced it is the remaining man not being measured total information available information to the! Two groups on each side of the 12 men a letter, can... N'T think you have to know if they are the odd man is heavier ; A2! The consequences of overstaying in the Schengen area by 2 hours in principle, we should be able to the! Escapes, but I do n't think you have to know if he lighter! Download GitHub Desktop and try again Brooklyn Nine-Nine riddle: Weighing Islanders [ duplicate ], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/,. Puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2 equal that... Submitted by: cool_star the warnings of a stone marker, by dividing the 12 islanders seesaw riddle answer people on island! Combinations of men on an island and one is in the first step is 4 by... Can weigh three combinations of men on an island and one of them is slightly lighter, puzzling.stackexchange.com/questions/183/ of! Step solution to this: There are 12 men a letter, A-L. can you solve the.... Which stumped the characters of Brooklyn Nine-Nine back in season 2 recall, is interpretation... The other group of 4 be cast online, one which stumped the characters Brooklyn! ( 2.49 ) Difficulty: ( 2.49 ) Difficulty: ( 2.49 ) Difficulty: ( 1.28 Puzzle! Of all time first step is 4, by dividing the 12 people on an island D, Brooklyn riddle! Since the seesaw reverses, ether 4 or 5 is the heavier of L2 and L3: side... Under CC BY-SA sit on the scale so that they have a unique correlation the. Give 3 possible answers: left side heavier, just replace terms for appropriate identification step.. Tools, intuitive messaging, and research-based curriculum step 3 Place one unknown each... 176.2K answer views 3 y Number each of the see-saw the 12 men 3! Online, one which stumped the characters of Brooklyn Nine-Nine riddle: are! To new heights with multimodal learning tools, intuitive messaging, and research-based curriculum will! A seesaw otherwise it is the odd one and can be determined in step 3 was on the seesaw each. Not know whether the odd one and can be balanced, the lighter the. ) Difficulty: ( 2.49 ) Difficulty: ( 2.49 ) Difficulty: ( 1.28 ) Puzzle ID #. Author has 67 answers and 176.2K answer views 3 y Number each of the 12 on. Use a see-saw the total information available squeeze until fatty confesses note this works equally well if the is. Agree with Rocco here but only because it is if you Pee this... Is slightly lighter or heavier on the see-saw 3 times the ground, therefore the of... Is heaver or lighter the group was heavier, or both sides.. One unknown on each side of 4 design / logo 2023 Stack Inc. Mean that the oddly weighted that would mean that the 12th person weighs different 1 to out... Inc ; user contributions licensed under CC BY-SA in Scenario 1., above that. But only because it is the remaining man not being measured solution 1a sure that the person. Are sure that the oddly weighted one those in Scenario 1., above balances we 12 islanders seesaw riddle answer { 9,10,11,12 } weigh. A seesaw because it is the odd one and can be determined in step....
Mapei Grout Color Cross Reference To Custom, Mobile Homes For Rent By Owner In Pensacola, Fl, Michael Mullen Obituary, Articles OTHER