exam Maths Puzzle Numerical Ability

The length of a rectangle is 3m more than 5 times the width.The perimeter is 126m find the length and width.

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exam Other Question

How many gallons of a 12% solution must be mixed with a 20% soltion to get 10 gallons of a 14% solution? If f(x)=5x-1 find the following:


f(a-2)