Measure 1 to 40 litres using only four cans? There is a drum full of milk, people come for buying milk in the range of 1-40 litres. You can have only 4 cans to draw milk out of drum. What should be the measurement of these four cans so that you can measure any amount of milk in the range of 1 to 40.

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Answers

2015-11-22T14:31:56+05:30
The cans you would use should be 1,3,9,27
for measuring anything between 1-40L they should suffice

Logic:
1,3 can get anything from 1 to 4 (1, 3-1, 3, 3+1)
put in the 9 and you can get anything from 5 to 13 (9-(1 to 4), 9+(1 to 4))
put in the 27 and you can get anything from 14 to 40 (27 - (1 to 13), 27 + (1 to 13))
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