Here's a puzzle which kept our pastoral group happy for a few hours last week...
When you've got it - don't post the answer. Just comment in a smug way that you worked it out!
- Four people have to cross this bridge at night.
- There cannot be more than two people on the bridge at any one time.
- It is too dangerous to be on the bridge without a torch, but there is only one torch, so two people crossing together will move at the speed of the slowest walker, and one must then bring the torch back.
- The four people walk at different speeds - taking 10, 5, 2 and 1 minutes to cross the bridge.
- How do they all get across in 17 minutes?
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3 comments:
Hmmm... I'm not sure "happy" is quite the right word!
It's only teamwork when the whole team is involved at the begining AND the end! Or put another way (unlike in the credit crunch) the winner is the one with the small (but slightly increasing) returns! Excellent puzzle.
got it!! nice one!! C
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