Riddle #129

Question: There are two ropes that both take exactly 1 hour to burn from end to end. You are unable to cut the rope. How can you burn the two ropes in a total of 45 minutes?

Riddle Discussion

By: Grogbor on 27/10/15

I assumed you said nothing of tying them, so I tied the two together at one end, and started them both on fire at the same time. I then tied the last quarter of each rope at the halfway point of the rope so that it catches fire when the fire reaches the 30 minute mark. The third quarter and the last quarter light at the same time, finishing off both ropes in 15 more minutes. A little more convoluted but it works.

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