Four men want to cross a bridge. They all begin on the same side. It is night, and they only have one flashlight with them. At most two men can cross the bridge at a time, and any party who crosses, either one or two people, must have the flashlight with them.
The flashlight must be walked back and forth: it cannot be thrown, etc. Each man walks at a different speed. A pair must walk together at the speed of the slower man.
Man 1 needs 1 minute to cross the bridge, Man 2 needs 2 minutes, Man 3 needs 5 Minutes, and man 4 needs 10 minutes. For example, if man 1 and man 3 walk across together, they need 5 minutes.
The question: How can all 4 men cross the bridge in 17 minutes?
2007-04-02
03:51:00
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4 answers
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asked by
Sunny_1_
3
in
Jokes & Riddles