12 islanders seesaw riddle answer

The island has no scales but there is a see-saw. However only three measurements are allowed. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) What is the arrow notation in the start of some lines in Vim? I wonder if this is the highest-viewed duplicate question of all time? Start off by weighing 4 against 4, setting the other 4 aside completely. Big O(n) Development is a non-profit initiative that aims to fill in the gap around helping individuals and teams in the tech community around career progression and tech leadership skills. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. Solution 1a. I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. Weapon damage assessment, or What hell have I unleashed? 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. Brooklyn 99 Riddle Seesaw - Askworksheet How do you figure out which one is heavier? (Detailed . Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. The second measurement was unequal, but the balance of weight shifted. So in principle, we should be able to solve the problem. Before that I didnt really get what you were doing. Weigh 12 against 1 to find out whether 12 is heaver or lighter. The island has no escapes, but there is a seesaw. Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. sideline: S1 S2 S3 S4, 2.A.1 if balanced Solution: The minimum number of times seesaw will be needed is 3. Show Answer PREV NEXT by Mikhael Panju v1. (seesaw measurement number 3), 2.A.2 if left is heavy -v, 1 split the 12 islanders into three groups Heres the brain teaser, verbatim from the show: There are 12 men on an island. This way of wording will help make it easier to figure out the puzzle. 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.. But this is simple! *** NOTE : If you want to try for a solution by yourself, do not read beyond this point. Thankyou for reading and understanding. The See-Saw. In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? 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). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Here is a more precise retelling of the riddle we found. 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Jordan's line about intimate parties in The Great Gatsby? 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. It is a see saw, not a giant scale! Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. You cannot determine lighter, heavier, proceed to solution 2c. test all the cases: go test . How do you figure out which one is heavier? Put any two groups on each side of the see-saw. rev2023.3.1.43268. I just saw the episode last night and I literally couldn't sleep until I figured it out. Learn more. If they are equal then Weigh 9, 10, 11 vs 1, 2, 3. III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. Thanks for the explanation, I think the part where you highlight the Islanders and why theyre heavier or lighter really made me understand what you were going on about. 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. 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." There are two possible results. The answer isnt TV friendly. You can figure out both in three steps. It only takes a minute to sign up. Each step here corresponds to one weighing. 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. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? now compare R2 and R3. Happy problem solving. The island has no escapes, but there is a seesaw. Problem solved. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) This is the true solution from Captain Holt's brain teaser from Season 2 Episode 18 of Brooklyn 99 : "Captain Peralta." Create an account to follow your favorite communities and start taking part in conversations. are patent descriptions/images in public domain? You must figure out which. Example for condition 1: put three "unknowns" against three "knowns". Death by roo roo. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. Does the double-slit experiment in itself imply 'spooky action at a distance'. There is an island with 12 islanders. 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). Can patents be featured/explained in a youtube video i.e. The exciting catch? sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 All our articles and reviews are written independently by the Netmums editorial team. You must figure out which. 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. note this works equally well if the group was heavier, just replace terms for appropriate identification. Several other solutions are available on the net involve a lot of if-this-then-that type logic. Presented below is a simpler solution. The essence of the riddle is: "There are 12 men on an island. You signed in with another tab or window. Take note of whether it is heavier or lighter. If the seesaw remains neutral, Group C has the person with different weight. Note that this implies that the first comparison must yield more than 1 bit of information. It is easier than everyone makes it. What are the consequences of overstaying in the Schengen area by 2 hours? seesaw: L1 L2 L3 L4 R1 R2 R3 R4 sign in (Third Use) If any pair gets on and the see-saw does *not* balance, set that pair aside from the rest--one of those two men is the 12th man. Thanks, AeJey for making it so clear! It is a good write up though. if balanced it is R4 - else it is the lighter of R3 and R2 It will halve 8 unknowns on the first balance, four on the second and two on the third. {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. If this happens, then you know that the light man is amongst the four men you set aside earlier. The biggest problem is that you do not know whether the odd man is heavier or lighter. Learn more about Stack Overflow the company, and our products. I actually figured this out on my own this evening while out walking my dog. The best answers are voted up and rise to the top, Not the answer you're looking for? At this point we just weight S4 against a Now put 7 on one end and 8 on the other. Software Engineer Author has 67 answers and 176.2K answer views 3 y Number each of the 12 people from 1 through 12. Answer explained - step by step Number the islanders 1 to 12 First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. 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. But you can only use the seesaw 3 times. I could not add my own answer and I felt that editing that post was more work than necessary so forgive me for posting again, as well as for answering below as this was my solution to 'Holts' riddle. This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. 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. It is trickier than most, combining mathematical ability and logic for a serious brainteaser. I like Rosa's answer squeeze until fatty confesses. {{3 remaining with known weight solution}} Since the weight is known, all you need to do is measure 2 men from the remaining 3 against each other. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx 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. The seesaw will NOT be perfectly balanced. 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. 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. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. If he is lighter then it is the one being measured and he is lighter. The following steps become identical to those in Scenario 1., above. Feel free to provide your own comment and I can delete this one. " 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. I am just looking for a little tweak to this answer. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) A seesaw is binary. 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. If they are the same, 8 is the one we are looking for (and lighter). Can a VGA monitor be connected to parallel port? 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? If the seesaw reverses, ether 4 or 5 is the oddly weighted one. All of these men weigh exactly Weigh A against B. sideline: S4 L1 L2 L3 L4 R4 You still have 1 remaining move and you now know if the odd man is heavier or lighter. 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. Connect and share knowledge within a single location that is structured and easy to search. 2150 Condos - West Tower Phase 2 Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. Thats really not conducive to Andy Samberg zingers. The best answers are voted up and rise to the top, Not the answer you're looking for? There are 12 men on an island. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Logic Logic puzzles require you to think. Find out the minimum number of times the seesaw will be used. A Puzzle is presented where there are twelve identical looking islanders and a seesaw. Can you solve the classic 12 marbles riddle? Thanks! Say as example 1234 were lighter. The island has no scales but there is a see-saw. You can only use it three times.. I later went back and refined it a little, so here it is. If balanced it is the heavy L1 else if unbalanced it is light R1. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. There is also a see-saw on the island. put A&B on the seesaw then put A&C ( 2 uses) logic will give you the answer. Comparing (1,2,3,4) to (5,6,7,8) does exactly this. Why do we kill some animals but not others? 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. (seesaw measurement number 3), 2.B.3 if right heavy Famous Quotes Rewritten to Make Them More Retweetable, Hey Sam, If You Pee on This Wall, It Pees Back At You. Now you know that one of the four men on one side is light. 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. That person is the heavier (or lighter). You must figure out which. If they are equal then. So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. There are 12 men on an island. 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. If the seesaw reverses, ether 4 or 5 is the oddly weighted one. (Second Use). Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. 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. Are you sure you want to create this branch? Press question mark to learn the rest of the keyboard shortcuts. we now know that the odd islander is S4. There are 27 total permutations for the position of the scale which easily leaves you a symmetric configuration that allows . You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. 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). 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. Now put 7 on one end and 8 on the other. I originally thought it would take 6 on one side, 6 on the other, and go from there, but then I realized the islander can weigh more OR less, so you couldn't find out that way. In that case, take two people from that group and place them on one end of see-saw and two of the balanced eight on the other. You don't know heavier or lighter, but you still have 1 remaining move. Weigh 1 against 2. How does a fan in a turbofan engine suck air in? This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. And there you have it! A tag already exists with the provided branch name. How do you do it? The riddle, as you'll recall, is this: There are twelve men on an island. You must figure out which. Weigh the lighter of the 2 men against any other neutral man. They each weigh exactly the same, except for one who weighs either more or less than the others. This one comes from this week's Brooklyn Nine-Nine episode! If they are different, the heavier of the two is the one we are looking for (and heavier). How to delete all UUID from fstab but not the UUID of boot filesystem. The riddle 12 men live on an island. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? Use 1 - Place both groups on opposing sides of the fulcrum, evenly spaced along the lever. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". 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 . Edit: Is the set of rational points of an (almost) simple algebraic group simple? Drift correction for sensor readings using a high-pass filter. The unique and extremely popular [citation needed] authority on pop culture since 2008. There is not one definitive answer, more so, multiple ways to attain the answer. Use the {{3 remaining with known weight solution}} from solution 1a. 11 of them weigh the same and one of them is either slightly 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.'. 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 (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. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. Your aim is to find out which person weighs a different amount. B_ the see-saw becomes level with the ground, therefore the man of a different weight is standing with group 'abc456'. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. 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. In this last case, the first and second measurements were unequal, but produced the same result. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. The seesaw itself is a lever. Connect and share knowledge within a single location that is structured and easy to search. There are no scales or other weighing device on the island. So, what is the 12 people on an island riddle and what is the answer? Take 3 men from the group and measure against 3 neutral men from 1-8. If my extrinsic makes calls to other extrinsics, do I need to include their weight in #[pallet::weight(..)]? 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? Would the reflected sun's radiation melt ice in LEO? Looking for more great riddles? (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 The one who is heavier is the different man (and heavier). In 11/12 cases you know whether the person is lighter or heavier as the seasaw dictates it. 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. Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. A tag already exists with the provided branch name. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. 12 men live on an island. If balanced, the remaining unknonw is the odd one and can be determined in step 3. Similar logic will help us design all further comparisons. 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). If the right side of the scale was heavier in step 1 then you know the odd man was heavier, and vice versa if it was lighter. The kid sitting on the end is the load. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Hope you all sleep well after reading this. In other news,did Pete Davidson tattoo a kid? Can someone suggest how we can modify the answer above ? (seesaw measurement number 3), 2.A.3 if right is heavy a) If 1,2,5,6,7 is heavier, then either 1 or 2 heavier, or 8 is lighter. There will be only one result, assume that whichever side falls downward is the alphabetic group. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. if balanced it is L4 - else it is the heavier of L2 and L3. 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). 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. One problem - you have to figure out which person it is too. Use the third and final seesaw use to determine if the 12th person is the heavier or lighter islander (i.e. If nothing happens, download Xcode and try again. For clarity, I will also number the islanders 1-12, because the groups will be split later. Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. neutral islander to figure out if it is heavy or light. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. How do you do it? 2150 Condos - West Tower Phase 2. 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 weigh exactly the same amount, but one of them is slightly lighter or heavier. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. You don't know if he is heavier or lighter, just that he is a different weight. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. if balanced it is S3 - else it is the lighter of S1 and S2. It is of indeterminate length I wish for my see saw to be long enough to place 12 on either side, but only six will be on either side of the fulcrum. 2.B.1 if left heavy now compare L2 and L3. Why are non-Western countries siding with China in the UN? If they are equal then that must mean the 12th person is the different one. seesaw: S1 S2 S3 (heavy) R1 R2 R3 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 page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. There is an island with 12 islanders. 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. 2: Place the man from your pair who was on the lower end of the see-saw . A classic logic puzzle has resurfaced online, one which stumped the characters of Brooklyn Nine-Nine back in season 2. You can only use it three times. b) If 1,2,5,6,7 is lighter, then one of 5,6,7 is different and lighter. There is also a see-saw on the island. You have a seesaw to find out which one is the light man, but you can only use the seesaw 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? 2) They are different. The seesaw will balance perfectly. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. (seesaw measurement number 3), 2.B.2 if balanced You have to figure out which Islander is the heaviest using a seesaw. (Second Use). Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. Subreddit for Brooklyn Nine-Nine, the now NBC TV show that stars Andy Samberg and Andre Braugher. sideline: L1 L2 L3 S4 L4 R4 If they are equal then it is the one not being measured and he is heavier. sorry my bad. New comments cannot be posted and votes cannot be cast. Take four random men and set them aside. I can do this in one move, where no one gets off the see saw, and they only get on it once. What are some tools or methods I can purchase to trace a water leak? They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. IF the scale is unequal, then you know the odd man is within the group 8-11. Otherwise the one who stayed is the oddly weighted one. If one is heavier they are the odd one otherwise it is 6. Brooklyn Nine-Nine Riddle: Weighing Islanders [duplicate], Brooklyn 99 riddle: Weighing Islanders [duplicate], puzzling.stackexchange.com/questions/9979/, puzzling.stackexchange.com/questions/183/. You can weigh three combinations of men on the see-saw. 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. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Proceed to solution 1a. The pattern for all islanders is below: person: A B C . @Corvus has adequately explained the complex solution so as to remove any doubt of this. In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. Note : I am not looking for a new way to solve this. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! 11 weigh exactly the same, but one of them is slightly lighter or heavier. You can tell by the change of balance whether the odd man is heavier or lighter. Was Galileo expecting to see so many stars? Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Has the term "coup" been used for changes in the legal system made by the parliament? If nothing happens, download GitHub Desktop and try again. sideline: S1 S2 S3 S4 ", (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. It is impossible to know both for sure in only three steps.). @emdee - Here is the link that you posted in the question. The exciting catch? Try that and see where it takes you. PTIJ Should we be afraid of Artificial Intelligence? Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. Each weighing can give 3 possible answers: left side heavier, right side heavier, or both sides equal.

12 islanders seesaw riddle answer 2023