[dsvick]

Originally Posted by pdurrant

Very good! That's a right answer!

For bonus points, work out how to get a gallon of water without having the two gallon container, just a tap (faucet) from which you can get water to fill the 3 or 7 pint jugs...

That's easy, just work back wards from the first solution

Spoiler:

Fill the 7 all the way and dump it into the 3 pint container, then dump the 3 out - do this twice, leaving 1 pint in the 7 pint container.

Dump that pint into the 3 pinter, and then fill the seven back up.