Most important puzzles for interview

1.      You have three water jugs, which can hold 8, 5 and 3 litres of water respectively. The 8 litres jug is full, and the other two are empty.

Divide the water into 4 & 4 litres without using other jugs?

Answer:

Firstly fill 5 litres of jug from 8 litres.

Empty the 5 liter jug into the 3 liter jug - leaving 2 litres in the 5 litres jug.

Empty 3litres jug into 8litres jug. Now 8 liters jug have 6 litres water.

Empty the 5 litre jug into 3 litres jug. Now 3 litres jug have 2 litres water because 5 litre jug have only 2 litres water.

Again, fill 5 litres of jug from 8 litres.

 Fill 1 litre water into 3 litre jug-leaving 4 litres in the 5 litre jug.

Again, empty 3litres jug into 8litres jug.

Now 8 & 5 litres jug have 4, 4 litres water.