Logic Puzzles

39. Measuring One Gallon

A milkman has 2 empty jugs: a 3-gallon jug and a 5-gallon jug. How can he measure exactly one gallon without wasting any milk?

Added 17 August 2011

Hint:

Consider filling the jugs in different ways to achieve the desired measurement.

Solution:

1. Fill the 3-gallon jug completely from the milk supply.

2. Pour from the 3-gallon jug into the 5-gallon jug until the 5-gallon jug is full. This will leave you with 1 gallon in the 3-gallon jug.


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