A Milkman has two empty jugs: a 3 litre and a 5 litre jug. how can he measure a exactly one litre of water?

Question

To fill a bucket, 25 jugs of water is required.
How many jugs of water will be required to fill the same bucket if the capacity of jug is reduced to two-fifth of its present?

Answer 1

the solution is really simple
3*2-5=1
first fill the 5 litre jug with 3 litre jug once. then there will be two litres space in 5 litre jug.
fill 5 litre jug until full with 3 litre jug once.

that is good!
just remained only one litre in 3 litre jug.