If there is a lily pad in a pond, and it doubles in size every minute and will completely cover the pond in one hour, how long will it take to cover a quarter the pond?
Given that the pond will be covered in one hour and that it doubles in size every minute, at one minute prior to the hour the pond would be half covered. Continuing this line of thought, if we go back another one minute, the pond would be a quarter covered, so the answer is 58 minutes.
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