A clock goes fast by one minute during the first hour, by two minutes at the end of the second hour, by 4 minutes at the end of 3rd hour, by eight minutes by the end of 4th hour, and so on. At the end of which hour, will it be fast by just

Question

A clock goes fast by one minute during the first hour, by two minutes at the end of the second hour, by 4 minutes at the end of 3rd hour, by eight minutes by the end of 4th hour, and so on. At the end of which hour, will it be fast by just over sixty minutes?

Quantrex Academy · Accepted Answer

Correct answer: C. Seventh

First hour 1 minute Second hour 2 minutes Third hour 4 minutes Fourth hour 8 minutes Fifth hour 16 minutes Sixth hour 32 minutes Seventh hour 64 minutes

A clock goes fast by one minute during the first hour, by two minutes at the end of the second hour, by 4 minutes at the end of 3rd hour, by eight minutes by the end of 4th hour, and so on. At the end of which hour, will it be fast by just over sixty minutes?

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