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Mensa Brainteasers

Week 36 - Monday

 

Leading up to a marathon, a runner has stepped up her training and set herself a number of streets to cover in a week.

On the first day she covers one quarter of the total distance.

The next day she covers one quarter of what is left.

The following day she covers two fifths of the remainder and on the fourth day half of the remaining distance.

She now has 10 miles left.

How many miles has she run?

 

 

 

Answer to this puzzle revealed on 05.09.13

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05 Sep 2013
Reveal answer

49.25926