exam Maths Puzzle Numerical Ability

If y varies directly as x, and y = 16 when x = 20.

Find y when x = 5.

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exam Other Question

Jack invests $1000 at a certain annual interest rate, and he invests another $2000 at an annual rate that is one half percent higher. If he receives a toal of $190 interest in one The perimeter of a rectangle is 154 inches. The length exceeds the width by 39 inches. Find the length and width.