exam Maths Puzzle Numerical Ability

find the difference 4/10-1/5

find the sum 1/8+1/10

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exam Other Question

Simplify by removing factors of 1.

m^2-4/(m+2)^2

This is supposed to be set up like a fraction. if the ratio of the measures of the interior angles of a quadrilateral is 3:5:7:9
what is the measure of the largest angle of the quadrilateral ?