Gallon Bottle Riddle
You have an empty three-gallon bottle and an empty five-gallon
bottle. How can you measure exactly one gallon of milk without
wasting any milk?
ANSWER
Fill the three-gallon bottle with milk, then pour the three gallons
of milk into the five-gallon bottle. Now again fill the three-gallon
bottle with milk and pour milk from the three-gallon bottle into
the five-gallon bottle until you fill it. You have one gallon left in
the three-gallon bottle.
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