Interview Question

Graduate Test Engineer Interview

-London, England

GAIN Capital

Mathematical reasoning test: You have two ropes and a lighter. Each rope has the following property: If you light one end of the rope, it will take one hour to burn to the other end. They don't necessarily burn at a uniform rate. How can you measure a period of 45 minutes? And 15 minutes?

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To measure 45 minutes with these two ropes, first you light one rope and wait for it to burn completely. When it's finished, light the other rope at both ends.

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