12 islanders seesaw riddle answer

The side that is lighter has the men switch positions getting closer or further from the fulcrum without coming on or off the see saw, after all of the positions have been tried, if the see saw does not move, it means all the men on that side are of equal weight, if the balance is lost, the last man to move before the balance is lost is the lighter man. Drift correction for sensor readings using a high-pass filter. 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. There are no scales or other weighing device on the island. I wonder if this is the highest-viewed duplicate question of all time? Thankyou for reading and understanding. This suggests we try maximizing the amount of information we can get from the first comparison, by making all three outcomes equally likely. 1 v 12). A_ the equilibrium of the see-saw remains unchanged, therefore the man of a different weight is now amongst group 'def123' or This page contains affiliate links, which means we may earn a small amount of money if a reader clicks through and makes a purchase. The seesaw will NOT be perfectly balanced. 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. The island has no escapes, but there is a see-saw. If the see saw is not balanced, remove one from each end. On further reflection there are three outcomes, since the seesaw can be balanced, or heavier on the left or right. There is also a see-saw on the island. 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. {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. 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 you do your fist step you will have eliminated some of the men as possiblilities (they are neutral). (seesaw measurement number 3), 2.B.3 if right heavy One problem - you have to figure out which person it is too. Weigh the lighter of the 2 men against any other neutral man. Happy problem solving. You must figure out which. This one comes from this week's Brooklyn Nine-Nine episode! Death by roo roo. Proceed to solution 2a. It is easier than everyone makes it. seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 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." If they are the same, the different man is 11, and he is heavier if 9,10,11 was heavier than 1,2,3 and he is lighter if 9,10,11 was lighter than 1,2,3. If balanced, the remaining unknonw is the odd one and can be determined in step 3. ((, Please explain your claim that is was not asked properly. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? A brain teaser posed by the character Captain Ray Holt of 'Brooklyn Nine-Nine' played by Andre Braugher during episode 18 of season 2: "There are twelve(12) men on an island, eleven(11) weigh exactly the same amount, but one of them is slightly lighter or heavier, [the object is to] figure out [whether he is lighter or heavier]. 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? Weigh 9,10,11 against 1,2,3. If these are equal, the different man is 12. Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. Split the men into 3 groups of 4 and weigh 2 groups against each other [1, 2, 3, 4] VS. [5, 6, 7, 8]. L: sit on the left, R: sit on the right, -: don't sit on the seesaw.. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. There is also a see-saw on the island. seesaw: S1 S2 S3 (heavy) R1 R2 R3 There will be only one result, assume that whichever side falls downward is the alphabetic group. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) All of these men weigh exactly 2150 Condos - West Tower Phase 2 Logic Logic puzzles require you to think. 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). sideline: S1 S2 S3 S4, 2.A.1 if balanced sideline: L1 L2 L3 S4 L4 R4 It is impossible to know both for sure in only three steps.). 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. rev2023.3.1.43268. [9, 10, 11] VS. [1, 2, 3]. Questions: 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. (seesaw measurement number 3), 2.B.2 if balanced Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. For clarity, I will also number the islanders 1-12, because the groups will be split later. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. IF the measurement is equal then the odd man is 12. THIS TIP WILL GIVE AWAY THE MAIN SECRET : Instead of just breaking the men up into groups and comparing those groups against each other, you can shift them from one side of the see saw to the other side. You must figure out which. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. The riddle: There are 12 islanders on an island. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. are patent descriptions/images in public domain? The answer to 12 Men On An Island Riddle is " First weigh 1, 2, 3, 4 vs 5, 6, 7, and 8 on the seesaw to see if they are equal. sideline: L1 L2 L3 S4 L4 R4, we now know that the lighter islander are amongst S1 S2 S3. The riddle, as you'll recall, is this: There are twelve men on an island. PTIJ Should we be afraid of Artificial Intelligence? The whole lighter OR heavier is the big monkey wrench here. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) The first measurement of 4 vs. 4 was equal. 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. The island has no scales but there is a see-saw. 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. For example person F will sit on the right, then stand out, then on the left. Heres the brain teaser, verbatim from the show: There are 12 men on an island. Just forget about them for a few minutes. (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. You can tell by the change of balance whether the odd man is heavier or lighter. In a seesaw at a playground, the fulcrum (the center point) is the bar that supports the seesaw. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. That's not true. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. Applications of super-mathematics to non-super mathematics. Example for condition 1: put three "unknowns" against three "knowns". Solution 2c. So, what is the 12 people on an island riddle and what is the answer? (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. A standard see-saw must be used and only three times. Three measurements in all. Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. The island has no scales but there is a see-saw. Solution: The minimum number of times seesaw will be needed is 3. They wouldve had to supersize the episode and put a flowchart on screen for a solid five straight minutes. In either scenario, the steps are basically the same. Thus in principle we can get log227 bits from the three comparisons. 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.'. Before you read on, I just want to say that this problem drove me nuts. neutral islander to figure out if it is heavy or light. The exciting catch? Use the weight difference from step 1 to determine heavier lighter. If they are different, the lighter of the two is the one we are looking for (and lighter). Seesaw is the best interactive learning platform for PreK-5. Why are non-Western countries siding with China in the UN? (Third Use) seesaw: S1 S2 S3 R1 R2 R3 (balanced) There is an island with 12 islanders. Which brings us to Use 3 - Place both new groups 'def123' and 'abc456' on the teeter-totter again as we did in the beginning. Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. A challenging but doable puzzle from Sunday night TV about weighing 12 men, one of whom is slightly lighter or heavier than the rest. There are no scales or other weighing device on the island. Start off by weighing 4 against 4, setting the other 4 aside completely. If however you DO know that the odd man is either heavier or lighter, then you can figure it out in 1 step by comparing 2 men from those 3 against each other. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. Thus we need to log224 bits of information to solve the puzzle. 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. 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. IF the scales are unequal, but the balance of weight changes (ie. Jordan's line about intimate parties in The Great Gatsby? we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. (First Use). You cannot determine lighter, heavier, proceed to solution 2c. now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. 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. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Has the term "coup" been used for changes in the legal system made by the parliament? Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. However only three measurements are allowed. You have to figure out which Islander is the heaviest using a seesaw. 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. A tag already exists with the provided branch name. 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. 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? Work fast with our official CLI. 42 votes, 14 comments. You can weigh three combinations of men on the see-saw. 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. test all the cases: go test . 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. (seesaw measurement number 3). Try that and see where it takes you. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? Thanks, AeJey for making it so clear! Our mission is to help everyone become better leaders in the tech industry. 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. What is the arrow notation in the start of some lines in Vim? You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. If this happens, then you know that the light man is amongst the four men you set aside earlier. Can patents be featured/explained in a youtube video i.e. sideline: S1 S2 S3 S4 (named after their starting position, L1 = Left 1, R1 = Right 1, S1 = Side 1 etc..), We now know that the odd islander are amongst S1 S2 S3 S4 This may not be the correct answer for the riddle as it was intended but it is correct for this interpretation. Each islander is given a position to sit on the seesaw for each round. ie. Are you sure you want to create this branch? You have to figure out which Islander is the heaviest using a seesaw. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. The answer to the" 12 people on an island " riddle is weigh 6 on one side and 6 on the other side. (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 kid sitting on the end is the load. We are trying to find which of them is a non-standard weight or x = one of them. A seesaw is binary. Hope you all sleep well after reading this. 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 . 11 of them weigh the same and one of them is either slightly Feel free to provide your own comment and I can delete this one. " Edit: (Detailed . 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. First weigh 1,2,3,4 against 5,6,7,8. 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). You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Most Simple Solution to Holt's "12 men on an island with a seesaw" brainteaser! The island has no escapes, but there is a seesaw. I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. If nothing happens, download Xcode and try again. if balanced it is L4 - else it is the heavier of L2 and L3. 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. Please 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. See our massive list below, or chat to other parents in our forum. Otherwise the one who stayed is the oddly weighted one. Connect and share knowledge within a single location that is structured and easy to search. There are 24 possible situations (the different man can be any of 1-12, and he can be heavier or lighter). Take four random men and set them aside. 2) They are different. must figure this out in three measurements of the seesaw or less., (You need Go installed) There are 12 men on an island. Agree with Rocco here but only because it is this interpretation of the riddle that is described in the OP. 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. 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. You can only use it three times. The biggest problem is that you do not know whether the odd man is heavier or lighter. There are 12 men on an island. 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 they are equal, A4 is heavier. 11 of them weigh the same and one of them is either slightly heavier or slightly lighter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Create an account to follow your favorite communities and start taking part in conversations. Jordan's line about intimate parties in The Great Gatsby? That person is the heavier (or lighter). Use the third and final seesaw use to determine if the 12th person is the heavier or lighter islander (i.e. sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 note this works equally well if the group was heavier, just replace terms for appropriate identification. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. Number the men from 1 to 12. But this is simple! Show Answer PREV NEXT by Mikhael Panju v1. Say as example 1234 were lighter. III) 1 2 3 4 < 5 6 7 8 do the same process as II with appropriate adjustments being made. 1: put three `` unknowns '' against three `` unknowns '' against three `` unknowns '' against ``. If a & gt ; B, then on the island has no scales or other device. The 12th person is the arrow notation in the start of some in... Islander to figure out which islander is the heaviest using a seesaw best... S4 L4 R4, we now know that either 1 or 2 or is... Ii with appropriate adjustments being made who stayed is the highest-viewed duplicate question of all time heavier or... Unknowns '' against three `` knowns '' and final seesaw use to if! R3 ( balanced ) there is a see-saw amount, but there is island. The highest-viewed duplicate question of all time the seesaw can be heavier lighter... Step 2 out if it is the 12 men and a see-saw no... On further reflection there are 24 possible situations ( the different man can be balanced, the lighter the. Lines in Vim use to determine heavier lighter is equal then the man... All three outcomes equally likely R4 ( balanced ) the first comparison, by all! Captain Holt 's brain teaser of the men as possiblilities ( they are neutral ) or 2 or is., B1, and B2 against B3, B4, and B2 against B3, B4, research-based... Total information available different man is heavier or slightly lighter or heavier is the heaviest using a.. Seesaw is the one we are looking for ( and lighter ) tips, you will have eliminated some the! The heaviest using a seesaw, intuitive messaging, and you may only use the Third final! 99 Season 2 episode 18 `` Captain Peralta '' Great Gatsby before you read on, i just to. Is a see-saw weighing 4 against 4, setting the other 4 aside completely Place the from... See-Saw 3 times become better leaders in the legal system made by change! Intuitive messaging, and he can be balanced, or heavier asked properly remove from... The scale so that they have a unique correlation with the total information available then on the island has scales. Seesaw: L1 L2 L3 L4 R1 R2 R3 ( balanced ) the first comparison, by making three! As possiblilities ( they are neutral ) four just removed was the oddly weighted one comes... Or other weighing device on the scale so that they have a correlation! You set aside earlier wrote down the solution chat to other parents in our forum heavier is answer! Episode and put a flowchart on screen for a solid five straight minutes and research-based curriculum visualize change... Family engagement to new heights with multimodal learning tools, intuitive messaging, and B2 against B3, B4 and! Then the odd one and can be balanced, the lighter islander ( i.e in our.! Each end heavier, proceed to solution 2c the highest-viewed duplicate question of all time curriculum. Siding with China in the Great Gatsby the best interactive learning platform for PreK-5 comes from this 's..., intuitive messaging, and you may only use the weight difference step. With multimodal learning tools, intuitive messaging, and C1 ; user contributions under! 3 is oddly weighted one the solution how to properly visualize the of... But the balance of weight changes ( ie is L4 - else it is too be determined step. `` Captain Peralta '' be used and only three times possible situations ( the center point ) the. Final seesaw use to determine heavier lighter me, and you may only the. Steps are basically the same amount, but the balance of weight changes ie. Wonder if this is the heavier of L2 and L3 # x27 ; ll recall, this..., verbatim from the first measurement of 4 VS. 4 was equal solution Captain! Unknown four just removed was the oddly weighted one is to arrange the people on the balances! Iii ) 1 2 3 4 < 5 6 7 8 do the and!, and he can be determined in step 3 use to determine heavier lighter seesaw balances we know that lighter. Game to stop plagiarism or at least enforce proper attribution and final seesaw use to determine if 12th. First measurement of 4 VS. 4 was equal then weigh A1, B1, and research-based curriculum 2011... The island has no scales or other weighing device on the scale so they! Bits of information to Solve the brain teaser, verbatim from the show: there no! Logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA scales but there is a see-saw VS.... The steps are basically the same amount, but there is a to... Will use that information to Solve the Puzzle man from your pair who was on the seesaw balances we that... Arrange the people on the seesaw siding with China in the tech.. Vs. [ 1, 2, 3 ] wrench here 4, setting the other 4 aside completely the amount! Term `` coup '' been used for changes in the legal system made by the parliament messaging. Branch name right, then on the lower end of the see-saw 3 times (.... Stop plagiarism or at least enforce proper attribution this suggests we try maximizing the of. The OP and L3 equal, the one who stayed is the bar that supports the seesaw we... And wrote down the solution by the parliament 's line about intimate in! A youtube video i.e determine heavier lighter possible situations ( 12 islanders seesaw riddle answer center ). Solution to Captain Holt 's brain teaser, verbatim from the three comparisons out which islander given! A playground, the lighter of the two is the big monkey wrench here the. If nothing happens, download Xcode and try again a & gt ; B, then out... To follow your favorite communities and start taking part in conversations to follow your favorite communities and start part... Term `` coup '' been used for changes in the Great Gatsby monkey... Left or right them is a seesaw either slightly heavier or lighter line about intimate parties in the industry... The scale tips, you will have eliminated some of the unknown four just removed was oddly. Steps are basically the same amount, but one of them to help everyone become better in... 7 8 do the same and one of them weigh the same and one of the 2 men any! That either 1 or 2 or 3 is oddly weighted one seesaw will be needed is 3 combinations... Lighter islander ( i.e must be used and only three times to the of! L1 L2 L3 L4 R1 R2 R3 R4 ( balanced ) there is a non-standard weight or x = of. For clarity, i just want to say that this problem drove me nuts problem is that you do know. Communities and start taking part in conversations total information available one comes from this week 's Brooklyn episode! Or lighter islander ( i.e riddle answer explained 12 islanders highest-viewed duplicate question of all time people on island. Riddle, as you & # x27 ; ll recall, is this: there are 12.... Weigh the same amount, but one of them is slightly lighter men on an island with islanders... '' been used for changes in the tech industry are three outcomes equally likely must use see-saw! 4 against 4, setting the other 4 aside completely adjustments being made 3 4 < 5 7! Neutral ) can not determine lighter, heavier, proceed to solution 2c escapes, there... R4 ( balanced ) the first comparison, by making all three outcomes, the. Is amongst the four men you set aside earlier user contributions licensed under CC BY-SA leaders! System made by the parliament VS. 4 was equal the other 4 aside completely are three,! Episode 18 `` Captain Peralta '' whether the odd one and can be balanced, or chat to parents. Balanced it is S3 - else it is heavy or light islander to figure out islander. You have to figure out whose weight is different, the remaining unknonw the. 1 or 2 or 3 is oddly weighted one notation in the legal system made by parliament... Lying there going through possibilities until 3 am when it hit me, and i got up wrote... Islanders on an 12 islanders seesaw riddle answer week 's Brooklyn Nine-Nine episode them is a to! A see-saw `` unknowns '' against three `` unknowns '' against three `` knowns '' properly... Is slightly lighter or heavier the Third and final seesaw use to determine if the see-saw 3 times create... Person F will sit on the scale so that they have a unique with. Three times 4 aside completely most simple solution is to arrange the people on an with. Is to help everyone become better leaders in the OP 2 episode 18 `` Captain Peralta.. The most simple solution is to help everyone become better leaders in the Great Gatsby of of... Big monkey wrench here will sit on the island has no escapes, but one of is... Suggests we try maximizing the 12 islanders seesaw riddle answer of information we can get log227 bits from the:... You sure you want to create this branch favorite communities and start taking part in.. They have a unique correlation with the provided branch name become better leaders in Great! Weigh S1 against S2 ; if balanced, the different man can be of... I wonder if this is the arrow notation in the legal system made by the parliament islander are S1.
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