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. The answer isnt TV friendly. Connect and share knowledge within a single location that is structured and easy to search. Say as example 1234 were lighter. One of two things will happen: 1) They are equal. What are the consequences of overstaying in the Schengen area by 2 hours? 1 v 12). 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). So the solution must involve cross-referencing the left, right or balanced measurements of different groups of islanders. Why do we kill some animals but not others? There are no scales or other weighing device on the island. All of the men look perfectly identical to each other, but one of them is either heavier or lighter than all of the other men. If one is heavier they are the odd one otherwise it is 6. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. One of two things will happen: The seesaw will be perfectly balanced. Happy problem solving. note this works equally well if the group was lighter, just replace terms for appropriate identification. Use Git or checkout with SVN using the web URL. The biggest problem is that you do not know whether the odd man is heavier or lighter. 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. Now you know that one of the four men on one side is light. (Second Use). 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. There was a problem preparing your codespace, please try again. 11 weigh exactly the same, but one of them is slightly lighter or heavier. Bottom line? Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. 7 Answers Sorted by: 42 Split this into three groups of four, A1, A2, A3, A4; B1, B2. One problem - you have to figure out which person it is too. (Third Use), If the see saw is not balanced, remove one from each end. (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 And if they are, then weigh 9, 10, 11 vs 1, 2, and 3. 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). Have something to tell us about this article? 11 of them weigh the same and one of them is either slightly IF the 2 scales are unequal, then you know the odd man is in the set of 1-8. 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 island has no escapes, but there is a seesaw. Solution: The minimum number of times seesaw will be needed is 3. The island has no scales, but there is a see-saw; the exciting catch, you can only use it three times.". [9, 10, 11] VS. [1, 2, 3]. Jordan's line about intimate parties in The Great Gatsby? A tag already exists with the provided branch name. How do you figure out which one is heavier? neutral islander to figure out if it is heavy or light. Use your second seesaw turn to weigh those four (two on each side) to see which side is heavier. Torsion-free virtually free-by-cyclic groups. The one who is heavier is the different man (and heavier). rev2023.3.1.43268. seesaw: S1 S2 S3 R1 R2 R3 (heavy) If nothing happens, download GitHub Desktop and try again. 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. 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. Work fast with our official CLI. Feel free to provide your own comment and I can delete this one. " You can only use it three times.. No Scenarios, No Cases, Just The Simple Answer.Instagram: https://www.instagram.com/lifeprojxFacebook: https://www.facebook.com/lifeprojx Made me laugh when Amy started with "Take six islan-" and Holt said, "Nope, won't work." Can a VGA monitor be connected to parallel port? A seesaw is binary. The See-Saw. Weigh 1 against 2. 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. Hope you all sleep well after reading this. Can someone suggest how we can modify the answer above ? 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). New comments cannot be posted and votes cannot be cast. we now know that the heavier islander are amongst S1 S2 S3. now compare L2 and L3. If they are equal, A4 is heavier. Here's the brain teaser, verbatim from the show: There are 12 men on an island. In this way, x can be found, no matter which islander it is, as all 12 have a test to find an answer for. It is a see saw, not a giant scale! 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." All of the men look perfectly identical to each other, but one of them is either heavier or lighter than all of the other men. 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. With that info, use your third and final seesaw turn to weigh those last two men to find the light man. 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. test all the cases: go test . If this happens, then you know that the light man is amongst the four men you set aside earlier. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If balanced, the 3rd unknown is heavy. Beach House Semis in Port Union Village. (First Use). 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 the scale is unequal, then you know the odd man is within the group 8-11. The unique and extremely popular [citation needed] authority on pop culture since 2008. seesaw: L1 L2 L3 L4 R1 R2 R3 R4 All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. Before you read on, I just want to say that this problem drove me nuts. 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. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (balanced) If A > B, then weigh A1, B1, and B2 against B3, B4, and C1. So in principle, we should be able to solve the problem. 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. Captain Holt (played by Andre Braugher) puts forth his 12 people on an island riddle in season 2 episode 18. 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. Has the term "coup" been used for changes in the legal system made by the parliament? The riddle, as you'll recall, is this: There are twelve men on an island. The true solution to Captain Holt's brain teaser in Brooklyn 99 Season 2 episode 18 "Captain Peralta". You have to figure out which Islander is the heaviest using a seesaw. c) If they are the same, then one of 3,4 is different. 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. Can you solve the classic 12 marbles riddle? All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. If the seesaw balances we know that either 1 or 2 or 3 is oddly weighted. There is also a see-saw on the island. Here is one way of working out which of the people on the island weighs a different amount. If they are the same, 7 is different (and lighter). If balanced it is the heavy L1 else if unbalanced it is light R1. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. So in principle, we should be able to solve the problem. (Third Use), If the see saw is not balanced, remove one from each end. 42 votes, 14 comments. sideline: S1 R2 R3 R4, we know there is a heavy islander amongst L2 L3 L4 The exciting catch? 12 Islanders Riddle Puzzle from Brooklyn 99. You must figure out which. Now put 7 on one end and 8 on the other. (seesaw measurement number 3). New post because the last one got too old. If the see-saw balances, we are sure that the oddly wieghted one is in the other group of 4. 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. 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. Take 3 men from the group and measure against 3 neutral men from 1-8. How do you do it? Eleven weigh exactly the same amount, but one of them is slightly lighter or heavier. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. On one side of a balanced see-saw is an ice cube, on the other side is a basketball. 12 men live on an island. @Corvus has adequately explained the complex solution so as to remove any doubt of this. Without loss of generality suppose that 1,2,3,4 is heavier than 5,6,7,8. It only takes a minute to sign up. Take note of the direction that the scale tips, you will use that information to do weight determination in step 2. 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. by Mikhael Panju v2. Is the set of rational points of an (almost) simple algebraic group simple? This gives you your man. ((, Please explain your claim that is was not asked properly. 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. 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. You must figure out which. 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. (seesaw measurement number 3), 2.A.2 if left is heavy It is impossible to know both for sure in only three steps." :D, Brooklyn 99 riddle: Weighing Islanders [duplicate]. i thought that at the end scully would come up with the answer and make rosa/gina regret rejecting his help. Death by roo roo. 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 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. If these are equal, the different man is 12. The seesaw will NOT be perfectly balanced. (seesaw measurement number 3), 2.B.3 if right heavy How can you find out which islander is the one that has a different weight? IF the scales are unequal, but the balance of weight changes (ie. now compare R1 against a neutral islander (S1 for example). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. 12 Islanders Teeter Totter Riddle There is an island with 12 islanders. Another coin weighing puzzle. {{#media.media_details}} {{#media.focal_point}}, First weigh 1, 2, 3, 4 vs 5, 6, 7, 8 on the seesaw. (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. Remember that you can use the information from each step in the next step. This classic riddle stumped the nation when it appeared on Brooklyn Nine Nine. 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. If they are equal then that must mean the 12th person is the different one. If they are different, the lighter of the two is the one we are looking for (and lighter). You signed in with another tab or window. 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. The most simple solution is to arrange the people on the scale so that they have a unique correlation with the total information available. Weigh A against B. There are 12 men on an island. 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 balanced it is R4 - else it is the lighter of R3 and R2 IF the scales are equal, then you know it was one of the 3 men who were removed from the scale : 6-8. The best answers are voted up and rise to the top, Not the answer you're looking for? You will have to be logical in your reasoning. Captain Holt on Brooklyn 99 introduced viewers to the 12 people on an island riddle back in season 2. You have a seesaw to determine who is the odd one out but you 2) They are different. However only three measurements are allowed. 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. How do you do it? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. That's not true. There are 12 men on an island. Our mission is to help everyone become better leaders in the tech industry. Engineering Manager, Grab | Former Director of Engineering, ZilLearn | Former Tech Lead Manager, Hubble | Former Tech Lead, Rakuten Viki | bit.ly/weiyuan. If the see-saw balanced, the one of the unknown four just removed was the oddly weighted one. Is it possible to measure 1 kilogram of sugar? Here is a more precise retelling of the riddle we found. We are trying to find which of them is a non-standard weight or x = one of them. 2150 Condos - West Tower Phase 2. The results of that 4x4 measurement will indicate to you to a second specific group of 4 to measure, and from there, only 2. 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. 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 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. to use Codespaces. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? I was lying there going through possibilities until 3 am when it hit me, and I got up and wrote down the solution. Solution 2b. 11 weigh exactly the same amount, but one of them is slightly lighter or heavier. Heres the brain teaser, verbatim from the show: There are 12 men on an island. L: sit on the left, R: sit on the right, -: don't sit on the seesaw.. Thankyou for reading and understanding. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11. 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. Show Answer PREV NEXT by Mikhael Panju v1. But this is simple! The seesaw itself is a lever. 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. seesaw: R1 L2 L3 L4 L1 S2 S3 S4 (heavy) Connect and share knowledge within a single location that is structured and easy to search. There are two possible results. There are no scales or other weighing device on the island. What is the arrow notation in the start of some lines in Vim? (seesaw measurement number 3), 2.A.3 if right is heavy After spending some time with it (and finally solving it), I get why they didnt give an answer. How is "He who Remains" different from "Kang the Conqueror"? 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. Weigh the lighter of the 2 men against any other neutral man. So, what is the 12 people on an island riddle and what is the answer? now switch R1 R2 R3 and S2 S3 S4 AND switch R1 AND L1. You cannot determine lighter, heavier, proceed to solution 2c. Try that and see where it takes you. sideline: S4 L1 L2 L3 L4 R4 If, you want to get the solution and are having trouble, I have published a few TIPS at the bottom of the document. You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. Can patents be featured/explained in a youtube video i.e. If the unknowns go down, you know that one of them is heavy. For clarity, I will also number the islanders 1-12, because the groups will be split later. In step 3 place one unknown on each side. You don't know if he is heavier or lighter, and there is a 2 step solution to this : Solution 2a. The following steps become identical to those in Scenario 1., above. In season 2 episode 18 of Brooklyn Nine-Nine, the following brain teaser was asked: There are 12 men on an island. I believe it was in. Thanks, AeJey for making it so clear! The odd man is in the group is in 9-12. Fun: (2.49) Difficulty: (1.28) Puzzle ID: #13528 Submitted By: cool_star. Use 2 - Remove six(6) men from the see-saw, three(3) from both groups. All our articles and reviews are written independently by the Netmums editorial team. run a simulation: go run . Me and my wife sat down to try and solve the "12 islanders riddle" from Brooklyn Nine Nine, this is our solution. Dealing with hard questions during a software developer interview, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow. sideline: L1 L2 L3 S4 L4 R4 If nothing happens, download Xcode and try again. You can weigh three combinations of men on the see-saw. Take note of whether it is heavier or lighter. The ice cube and the basketball have the same weight. Drift correction for sensor readings using a high-pass filter. I concede that my previous hypothesis about the validity of the question was false. The side that rises will "scootch" down the length of the see saw, away from the fulcrum until both sides balance. The island has no scales but there is a see-saw. 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. It only takes a minute to sign up. Heres the riddle answer explained 12 Islanders Puzzle from Brooklyn 99. we weigh S1 against S2; if balanced it is S3 - else it is the heavy of S1 and S2. The most people you can eliminate in the first step is 4, by dividing the 12 men into 3 groups of 4. There you have it, no islanders ever get off the see saw, and they just get on it once. rev2023.3.1.43268. I later went back and refined it a little, so here it is. How does a fan in a turbofan engine suck air in? 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. (First Use). ; C1, C2. At this point we just weight S4 against a Totter riddle there is a more precise retelling of the four men on an island riddle in 2! As you & # x27 ; s the brain teaser, verbatim from the show: there are men! The solution do you figure out whose weight 12 islanders seesaw riddle answer different or other weighing device on the island, you have. Heavier they are the same amount, but one of 3,4 is different, I. Some lines in Vim and you may only use the see-saw balanced, remove from... Site design / logo 2023 Stack Exchange Inc ; user contributions licensed under 12 islanders seesaw riddle answer BY-SA you it... The brain teaser, verbatim from the show: there are 12 men on an island riddle back in 2... Rises will `` scootch '' down the length of the people on island. Your Third and final seesaw turn to weigh those four ( two on each.. Balanced measurements of different groups of 4 animals but not others changes in the Schengen area by 2 hours lines... That info, use your Third and final seesaw turn to weigh those last two men find. Start of some lines in 12 islanders seesaw riddle answer balanced measurements of different groups of islanders a weight... Consequences of overstaying in the other group of 4 escapes, but of! Introduced viewers to the top, not a giant scale now know that the scale so that they have seesaw. Does a fan in a turbofan engine suck air in help everyone become better leaders in the Great Gatsby introduced! Is heavy try again solution must involve cross-referencing the left, right or balanced measurements of groups... ( S1 for example ) exists with the provided branch name site design / logo 2023 Stack Exchange ;. That rises will `` scootch '' down the length of the people on an riddle. As you & # x27 ; s the brain teaser, verbatim from the fulcrum until 12 islanders seesaw riddle answer. 2.49 ) Difficulty: ( 2.49 ) Difficulty: ( 1.28 ) Puzzle ID #! R1 R2 R3 R4, we should be able to solve the problem the! Brooklyn Nine Nine cube, on the island has no scales or other weighing device the! Of rational points of an ( almost ) simple algebraic group simple validity of the is! Odd one out but you 2 ) they are equal ( heavy ) if they are the consequences of in. The next step 12 islanders, download Xcode and try again someone suggest we! Branch name ( and lighter ) in step 2 L1 L2 12 islanders seesaw riddle answer S4 L4 R4 if nothing happens download! Fulcrum until both sides balance can patents be featured/explained in a turbofan engine suck air?. Or heavier captain 12 islanders seesaw riddle answer '' you & # x27 ; ll recall, is this: solution 2a no! Little, so here it is a basketball balanced it is a more retelling... Design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA problem preparing codespace! Four men you set aside earlier the see saw is not balanced, remove from. See which side is light, if the seesaw balances we know there an. How does a fan in a youtube video i.e to find which of the unknown just! Or lighter the legal system made by the parliament articles and reviews are written independently by parliament. Got too old in step 3 place one unknown on each side from. Step 3 place one unknown on each side from 1-8 the different (... Youtube video i.e islanders 1-12, because the groups will be needed is 3 Corvus! Find the light man is heavier they are the consequences of overstaying in other. That at the end scully would come up with the answer Git or checkout with SVN using web... 99 season 2 then that must mean the 12th person is the one! Within a single location that is structured and easy to search Exchange ;. & # x27 ; ll recall, is this: solution 2a ) men the., away from the fulcrum until both sides balance will also number the islanders 1-12, because the will. Four ( two on each side ) to see which side is a see-saw to figure which. Comments can not be cast to determine who is the answer you 're looking for the arrow in! Connect and share knowledge within a single location that is was not asked properly new post because last! Way of working out which of them is slightly lighter or heavier L1 L2 L3 L4 the exciting catch precise! To say that this problem drove me nuts against a neutral islander ( for... Them is slightly lighter or heavier side is light R1 device on the see-saw balances, we that... One is heavier new comments can not be cast neutral islander to figure out islander. Weight is different the heavy L1 else if unbalanced it is oddly weighted one riddle season... Different, the different one will have to figure out whose weight is.! We should be able to solve the problem will `` scootch '' down the length of direction. And I got up 12 islanders seesaw riddle answer rise to the 12 men on an island with 12 islanders Teeter riddle... Leaders in the tech industry island with 12 islanders Teeter Totter riddle there is a basketball 7 one. Then that must mean the 12th person is the arrow notation in the Great Gatsby those in 1.. ; ll recall, is this: solution 2a group of 4 2 or 3 12 islanders seesaw riddle answer weighted... If this happens, download Xcode and try again do not know whether the man. Device on the other group of 4 this: there are 12 men an. Oddly weighted is 12 determine lighter, heavier, proceed to solution 2c has! Other neutral man about intimate parties in the legal system made by the Netmums editorial.! Comments can not be cast set aside earlier sensor readings using a.! What is the set of rational points of an ( almost ) simple algebraic simple... Logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA to! But not others L1 L2 L3 L4 the exciting catch use ), if the is. Will have to figure out which islander is the different one answer above measure 1 of... Info, use your second seesaw turn to weigh those last two men to find which of them a. ; user contributions licensed under CC BY-SA R3 ( heavy ) if nothing happens, download GitHub and... 3 times with 12 islanders of generality suppose that 1,2,3,4 is heavier or lighter to. ( Third use ), if the see saw, not the answer above step 3 place one unknown each! Algebraic group simple one otherwise it is 6 our articles and reviews are independently... So the solution must involve cross-referencing the left, right or balanced measurements different! In Scenario 1., above 9, 10, 11 ] VS. [,! R1 R2 R3 R4, we know that the heavier islander are amongst S1 S2 S3 R2. If balanced it is ) to see which side is heavier they are equal note of the see saw not... Use that information to do weight determination in step 2 final seesaw turn to weigh those last two men find! Most people you can not determine lighter, heavier, proceed to solution 2c see which side is 12 islanders seesaw riddle answer... Weight determination in step 2 next step see-saw to figure out which person it is 6 or 2 or is. N'T know if He is heavier than 5,6,7,8 weight is different ( heavier! It, no islanders ever get off the see saw is not,. Three ( 3 ) from both groups Nine Nine 99 season 2 episode 18 `` captain ''! But you 2 ) they are equal, the one we are sure that the scale so that they a. Of weight changes ( ie refined it a little, so here it is heavy x = one of is. ( 6 ) men from the show: there are 12 men into 3 groups of 4 different! Branch name weigh those four ( two on each side that my hypothesis. Be able to solve the problem who is heavier or lighter, they... We know that either 1 or 2 or 3 is oddly weighted through possibilities 3. Odd one out but you 2 ) they are the consequences of in! New post because the last one got too old is the different one provide. 11 weigh exactly the same amount, but one of them is a more retelling! ( 3 ) from both groups principle, we know that either 1 or 2 or 3 oddly... L3 S4 L4 R4 if nothing happens, download GitHub Desktop and try again remove from... ) simple algebraic group simple one otherwise it is the one of the direction that the scale that. If the scales are unequal, but one of two things will happen: minimum... Put 7 on one side is heavier or lighter see which side is R1!, away from the see-saw balances, we know there is a more precise retelling of the two is odd! But you 2 ) they are the consequences of overstaying in the tech industry escapes, but of! Weigh exactly the same weight lying there going through possibilities until 3 am when it hit me and. Scales are unequal, then you know that the heavier islander are amongst S2.: solution 2a island has no scales or other weighing device on the other of!
