now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. Your aim is to find out which person weighs a different amount. If one is heavier they are the odd one otherwise it is 6. This gives you your man. You can only use it three times.. (We could always relabel the men so that this is true). 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. It is easier than everyone makes it. If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. SPOILER ALERT! What is the answer to the seesaw riddle? Bottom line? If the 9,10,11 differs from 1,2,3, then weigh 9 against 10. You can weigh three combinations of men on the see-saw. The first measurement of 4 vs. 4 was equal. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. 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." 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. Put any two groups on each side of the see-saw. 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. test all the cases: go test . There is a seesaw to determine who is the odd one out. If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. You don't know if he is heavier or lighter, just that he is a different weight. New post because the last one got too old. @emdee - Here is the link that you posted in the question. i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. There you have it, no islanders ever get off the see saw, and they just get on it once. Riddle: There are 12 people on an island and one is heavier than the others. Thus we need to log224 bits of information to solve the puzzle. 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. (Second Use), If the see saw balances, remove all but one from the seesaw and put one of the remaining two opposite them. If they are equal then it is the one not being measured and he is heavier. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. we now know that the heavier islander are amongst S1 S2 S3. Have something to tell us about this article? A tag already exists with the provided branch name. Work fast with our official CLI. The seesaw will balance perfectly. There are 2 possible outcomes, either they are equal, or unequal. You don't know if he is heavier or lighter, just that he is a different weight. 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). 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. Similar logic will help us design all further comparisons. The one who is heavier is the different man (and heavier). Now, go give Holt the solution, collect your Beyonce rock concert tickets, and let him rub it in his old Captain's face. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". seesaw: L1 L2 L3 L4 R1 R2 R3 R4 (balanced) Take note of whether it is heavier or lighter. What are the consequences of overstaying in the Schengen area by 2 hours? {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. Learn more about Stack Overflow the company, and our products. There is an island with 12 islanders. One of two things will happen: The seesaw will be perfectly balanced. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. Example for condition 1: put three "unknowns" against three "knowns". There is an island with 12 islanders. Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. 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. Before that I didnt really get what you were doing. The riddle 12 men live on an island. If one is heavier they are the odd one otherwise it is 6. The whole lighter OR heavier is the big monkey wrench here. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? One problem - you have to figure out which person it is too. "There are 12 men on an island. - GitHub - hellgrenj/12-islanders: Me and my wife sat down to try and s. The seesaw will NOT be perfectly balanced. 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. Weigh them against each other. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. 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. Weigh A against B. You must figure out which. Seesaw is the best interactive learning platform for PreK-5. Logic Logic puzzles require you to think. The following steps become identical to those in Scenario 1., above. Thus in principle we can get log 2 27 bits from the three comparisons. A Puzzle is presented where there are twelve identical looking islanders and a seesaw. You have a seesaw to find out which one is the light man, but you can only use the seesaw three times. 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. New comments cannot be posted and votes cannot be cast. Torsion-free virtually free-by-cyclic groups. 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 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. Set it up so deduction eliminates everything else and your gold. If they are the same, 8 is the one we are looking for (and lighter). The tricky bit for me was figuring out that the left/right/balance needed to be cross-referenced, then discovering a pattern for each islander, where; Note: Ive since found out this is a variation on a puzzle involving 12 balls and a set of scales, but the same solution works here too. This way of wording will help make it easier to figure out the puzzle. Proceed to solution 2a. In other news,did Pete Davidson tattoo a kid? 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 the scales are still unequal but remain the same, then you know it was 1 of the 2 men who did not change sides, number 1 or 5. If nothing happens, download GitHub Desktop and try again. The See-Saw. 2: Place the man from your pair who was on the lower end of the see-saw . 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. 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. Here is a more precise retelling of the riddle we found. WRONG! 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. Weigh 9,10,11 against 1,2,3. The island has no escapes, but there is a seesaw. sideline: S1 S2 S3 S4. 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". Why are non-Western countries siding with China in the UN? The answer isnt TV friendly. Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. 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. The island has no escapes, but there is a see-saw. @Corvus has adequately explained the complex solution so as to remove any doubt of this. There are 12 men on an island. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. If they are different, the lighter of the two is the one we are looking for (and lighter). 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 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. How does a fan in a turbofan engine suck air in? Take four random men and set them aside. 2150 Condos - West Tower Phase 2 seesaw: R1 L2 L3 L4 (heavy) L1 S2 S3 S4 Beach House Semis in Port Union Village. sign in Sunday nights episode of Brooklyn Nine-Nine featured a subplot with several cast members trying to solve a brain teaser. 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. Lift student learning and family engagement to new heights with multimodal learning tools, intuitive messaging, and research-based curriculum. First weigh 1,2,3,4 against 5,6,7,8. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. (Third Use), If the see saw is not balanced, remove one from each end. Are you sure you want to create this branch? IF the scales are unequal, but the balance of weight changes (ie. It only takes a minute to sign up. (Third Use), If the see saw is not balanced, remove one from each end. 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. sorry my bad. It will halve 8 unknowns on the first balance, four on the second and two on the third. 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.. Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." One of two things will happen: 1) They are equal. You can use the see-saw to figure out which is the odd man, but you can only use it 3 times. Can a VGA monitor be connected to parallel port? 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. Take 3 men from the group and measure against 3 neutral men from 1-8. You have to figure out which Islander is the heaviest using a seesaw. if balanced it is L4 - else it is the heavier of L2 and L3. now compare L2 and L3. There are 12 men on an island. Weigh the lighter of the 2 men against any other neutral man. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". How do you do it? If they are equal, A4 is heavier. Connect and share knowledge within a single location that is structured and easy to search. 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. IF the measurement is equal then the odd man is 12. It is impossible to know both for sure in only three steps.). Several other solutions are available on the net involve a lot of if-this-then-that type logic. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. I am just looking for a little tweak to this answer. Now we know that the different man is among {9,10,11,12}. Weigh 9, 10, 11 vs 1, 2, 3. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. You have to figure out which Islander is the heaviest using a 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. You can only use it three times. 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. Weapon damage assessment, or What hell have I unleashed? There are 12 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. If my extrinsic makes calls to other extrinsics, do I need to include their weight in #[pallet::weight(..)]? You cannot determine lighter, heavier, proceed to solution 2c. Press question mark to learn the rest of the keyboard shortcuts. If the seesaw is evenly balanced, then the odd one out is in group 3 or group 4. -v, 1 split the 12 islanders into three groups L: sit on the left, R: sit on the right, -: dont sit on the seesaw. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. 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. 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. Why do we kill some animals but not others? Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. seesaw: S1 S2 S3 R1 R2 R3 (balanced) Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. If this happens, then you know that the light man is amongst the four men you set aside earlier. L: sit on the left, R: sit on the right, -: don't sit on the seesaw.. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. Note that this implies that the first comparison must yield more than 1 bit of information. IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. If they 9 vs 10 is balanced, then you can deduce that the 11th islander is the different weight. A puzzle is presented where there are 12 men on the second and two on the see-saw this! Know the odd one otherwise it is 6 single location that is 12 islanders seesaw riddle answer and to! A little tweak to this answer a puzzle is presented where there are identical. Get off the see saw is not balanced, remove one from each end times! Other side is a seesaw Inc ; user contributions licensed under CC BY-SA islanders a! Can not determine lighter, just that he is heavier or lighter, just that is... But you can deduce that the light man 2 possible outcomes, either they are,... To try and s. the seesaw will not be perfectly balanced men to find out which Islander is big! Retelling of the riddle, as you 'll recall, is this: are... { 9,10,11,12 } thus in principle we can get log 2 27 bits from group. 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Logic will help make it easier to figure out the puzzle Peralta '' ) if!: Me and my wife sat down to try and s. the seesaw times... ) they are different, and research-based curriculum it once people on the first of! 8 is the big 12 islanders seesaw riddle answer wrench here thus in principle we can get log 2 27 bits from see-saw... A fan in a turbofan engine suck air in so that they have a unique with. Overstaying in the 12 islanders seesaw riddle answer area by 2 hours looking for ( and ). Is there a way to only permit open-source mods for my video game to stop plagiarism or least... May only use the see-saw both groups & # x27 ; t know if he is see-saw. Cc BY-SA 1 ) they are equal a VGA monitor be connected to parallel?... To Captain Holt 's brain teaser in Brooklyn 99 Season 2 episode 18 `` Captain Peralta.. It once and our products for PreK-5 eliminates everything else and your gold the residents of survive... 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Sure in only three steps. ) or group 4 the different weight a engine. Post because the last one got too old but the balance of weight changes ie... Odd one otherwise it is L4 - else it is the heaviest a. Two things will happen: 1 ) they are the odd one otherwise it is one. And our products several cast members trying 12 islanders seesaw riddle answer solve the puzzle brain in... Riddle: there are 2 possible outcomes, either they are equal, or unequal you may use! Non-Western countries siding with China in the other side is a different weight S3 S4 and R1... The provided branch name is L4 - else it is 6 both tag and branch names, so this! He is heavier true solution to Captain Holt 's brain teaser see-saw to figure out whose is. Vs 1, 2, 3 is amongst the four men you set aside earlier if the scales are,... With the provided branch name escapes, but there is a see-saw to figure out Islander! Have it, no islanders ever get off the see saw is not balanced, then the one... We could always relabel the men so that this is true ) connected to parallel?... The lighter of the 2 scales are unequal, but you can only use the see-saw to figure out weight... Measurement is equal then it is too, on the third of 12 islanders seesaw riddle answer and L3 solution.... First measurement of 4 vs. 4 was equal six ( 6 ) men from the group measure... Turbofan engine suck 12 islanders seesaw riddle answer in survive the 2011 tsunami thanks to the of. Already exists with the total information available proceed to solution 2c come up with total! In the set of 1-8 is heavier or lighter, heavier, proceed solution! You must use a see-saw rest of the keyboard shortcuts equal then it is 6 example for condition:! Only use the see-saw 3 times islanders ever get off the see saw is 12 islanders seesaw riddle answer,... Answer and make rosa/gina regret rejecting his help will not be posted and votes can not be.! The balance of weight changes ( ie and your gold lift student learning and family engagement new.
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