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Today Puzzle #725

Puzzle No. 725– Wednesday 24 April 2020

I am running for my daily 1 hour of exercise during lockdown. I started by managing 5km. Each week I am able to go 10% further. How many weeks will it take me to reach 10km within an hour?

Today’s #PuzzleForToday has been set by Dr Shaun Fitzgerald, Fellow of Girton College

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The distance D travelled after n weeks is D=5km x (1+10%)n. D first exceeds 10km when n=8 weeks.

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