The Good Thief and His Companions

Four thieves went for a robbery and they stole coconuts from a farm Then they heard some noise and went hiding behind the bush. Then the first one came out and he was a good thief. He divided the coconuts into 4 equal parts and took his share. The second one case divided the remaining into four equal shares and took one extra and went home. Then came the third thief who also divided it into four and took two extra coconuts and left. Then came the fourth man. He took all the remaining coconuts and left. On the next day when they met in the market interestingly all the four of them had equal number of coconuts with them. Then what should be the minimum number of coconuts they have collected that they can manage to fulfil all the above conditions without dividing any coconut into pieces.


The answer is 16.

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2 solutions

Both 16 & 12 will give the solution.

FOR 16:- 1st man took 4. remains 12 2nd person makes remaining 12 into 4 parts i.e., 3,3,3,3 and took 1 extra i.e., (3+1). remains 8 3rd person makes 8 into 4 parts as 2,2,2,2 and took 2 extra i.e., (2+2). remains 4, taken by 4th guy.

FOR 12:- 1st guy took 3, remains 9 2nd guy makes remaining as 2,2,2,2 and took one extra i.e., (2+1). remains 6. 3rd guy makes remaining as 1,1,1,1 and took 2 extra i.e., (1+2), remains 3, taken by 4th.

one key point- Nowhere in the question, it is mentioned as coconuts should be divided equally while counting by thieves. But they should get equal number without making coconuts into pieces. so both 12, 16 are correct answers.

For 12, the 2nd guy has not divided them in equal parts then. He needs to first divide them in equal parts, take his one part and take 1 more. We cannot divide 9 in 4 equal parts.

gayatree anand - 7 years, 2 months ago

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The question did not say EQUAL. In fact the question is not clear.

Anumongkol Sirivedhin - 7 years, 1 month ago
Paudel Ashish
Mar 12, 2014

let x be the number of coconuts. then the no. of coconuts taken by 1st thief = x/4 then, remaining no of coconuts = 3x/4 the second thief takes (3x/16)+1 by question, they have equal number of coconuts so... (3x/16)+1 = x/4 solving, we get x=16. we can see that it satisfies all the given conditions...i.e. everyone gets 4 coconuts each

Hi i am sorry paudel ashish, 12 should be the correct answer Start with 12 and the all will get 3 each according to the condition.

  • Suppose they collected 12 coconuts. cond. 1> first 1 divides it into 4( 3, 3, 3, 3) parts and take one part| so total left is 9. Cond. 2> second divides the remaining 9 in 4 parts(2, 2, 2, 2) and takes one part+1 extra| So total left is 6. Cond 3> Third divides the remaining 6 into 4 parts (1,1,1,1) and takes one part+2 extra| now remaining is 3. Cond 4> 4th one takes the remaining 3 and left .

so with 12 all the conditions are being full filled.

Vipin Gautam - 7 years, 2 months ago

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