⟩ If you had an infinite supply of water and a 5 quart and 3 quart pail, how would you measure exactly 4 quarts?
Fill 5 quart pail and transfer to 3 quart pail. you are
left with 2 quart of water in 5 quart pail.Then remove
water from 3 quart pail and transfer that 2 quart of water
to 3 quart pail. Refill 5 quart pail again and transfer 1
quart of water to already 2 quart filled 3 quart pail. you
are left with 4 quarts of water in 5 quart pail.