Posted by: republican January 25, 2007
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Rope puzzle:
Rope A and Rope B are of different lengths and thickness, but each burns in exactly 1 hour.
How would you measure 45 mins by burning the ropes?
You can't cut the ropes. The ropes aren't uniform either (i.e. if you burn a rope upto its midpoint, it doesn't necessarily mean that 1/2 hour's elapsed).