Thread: Odd Escape
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Unread 09-04-2004, 20:37
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Ian Mackenzie Ian Mackenzie is offline
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Re: Odd Escape

Sweet, I love cookies. (Just ask anyone on my team...)

Actually, I got it pretty quickly, through a combination of laziness and luck. I thought about doing some actual rotations as you described, but I really didn't want to, and figured there should be a more elegant method.

Here's another really cool problem for you: You have two ropes, and the only thing you know about them is they take exactly 1 hour each to burn (i.e. if you lit either end, the flame would take exactly 1 hour to reach the other end). The ropes are not of constant cross-section, so half a rope will not necessarily take half an hour to burn, and the ropes are not the same (i.e. not only do they burn unevenly, they don't even burn equally). Given these two ropes and a lighter, how do you measure exactly 45 minutes?
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