Easy fill the 5 litre bucket with enough water then pour in 3 litres of water into the 5 litre bucket from the 3 litre bucket. Try to understand what i am saying if you can, this itself is a riddle lolz!!!
next pour water from the 5 litre bucket into the 3 litre bucket and fill it upto the brim
now throw all the water from the 3 litre bucket and pour the remaining 2 litres in the 5 litre bucket into the 3 litre bucket
Next fill the 5 litre bucket again and pour water into the 3 litre bucket (which already has 2 litres in it) i.e. the 3 litre bucket can only take one more litre which means…
there is exactly 4 litres left in the 5 litre bucket
:k: