re: Die Hard with a Vengeance questions

quote:

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Fill up the 3 gallon jug. Empty it into the 5 gallon jug. Fill up the 3 gallon jug. Top off the 5 gallon jug, leaving 1 gallon in the 3 gallon jug. Empty the 5 gallon jug. Pour the 1 gallon from the 3 gallon jug into the 5 gallon jug. Fill up the 3 gallon jug and empty it into the 5 gallon jug. That gives you exactly 4 gallons.

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Or...

You can fill up the 5-gallon jug, then pour from it to fill up the 3-gallon jug. This leaves you with the two gallons in the 5-gallon jug. Then you empty the 3-gallon jug and pour the remaining two gallons from the 5-gallon jug into it. Once again fill the 5-gallon jug, then pour off one gallon into the 3-gallon jug to finish filling it, leaving you with four gallons in the 5-gallon jug.