journal 89 feb 17th 09

begin with an unmarked tub that contains a little more than 17 gallons of water.

you have a three gallon and a five gallon measuring device.  without losing any water, measure out four gallons and twelve gallons into two separate unmarked tubs.

you cannot retrieve water from the unmarked tubs once you have added it. 

first fill up the 5 gallon and dump it until the 3 gallon.  then dump the 2 remaining until tub a and the 3 gallon in tub b.  repeat this and you have your four gallon tub filled.  then fill up the 3 gallon two more times to make the twelve.