QuantForcesquant interview practice

RB_CH01_Q021. Lily pad doubling 30 days

difficulty 1500·answer type: numeric·Not solved

Problem

You start with a single lily pad sitting on an otherwise empty pond. You are told that the surface area of the lily pad doubles every day and that it will take 30 days for the single lily pad to cover the surface of the pond. If instead of one lily pad you start with eight lily pads (each identical in characteristics to the original single lily pad), how many days will it take for the surface of the pond to become covered?

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