Riddle

You need to measure out 4 liters of water.
All you have is a 3 liter bottle and a 5 liter bottle.
How do you do it?


---------------Answer---------------
1. Fill 3 liter bottle and pour into 5 liter bottle
2. Fill it again and pour till there is 5 liters in the 5 liter bottle and 1 liter left in the 3 liter bottle
3. Empty the 5 liter bottle
4. Pour the 1 liter that is in the 3 liter bottle into the 5 liter bottle
5. Fill the 3 liter bottle and pour it into the 5 liter bottle

Congrats you now have 4 liters of water