You have a 5 gallon jug and a 3 gallon jug. You have no other measuring devices.

Measure out exactly 4 gallons of water (Assume you have a river handy, or some other limitless water supply).

Fill the big jug. Then pour all the water to the top of the smaller jug. Now you have 2 gallons in the (5) gal jug. So, now empty the 3 gal jug. Pour the water from the 5 into the 3. Fill the 5 again. Fill 3 with water from 5. 5 now has 4 gallons. Not too hard.

Posted by Chaz on 2003-05-04 07:11:53