exam Maths Puzzle Numerical Ability

A regular has an exterior angle which equals 36 degrees.
how many sides has this regular polygon got?

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exam Other Question

The sum of the reciprocals of two consecutive odd integers is 8/15.Find the larger integer A driver sets out on a 20-mile trip. When he has gone halfway he finds he has averaged 25 mph. At what speed must he travel the rest of the way to make his overall average speed for the trip 40 mph?