exam Maths Puzzle Numerical Ability

Simplify:

(a^1/2 / b^2)^2 * (b^3/2 / a^2/3)^3

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exam Other Question

(9x+7)(7x+5) This is a critical thinking exercise, that may or may not require algebra.
A Wagon Wheel is placed against a wall.One point on the edge of the wheel is 5 inches from the ground and 10 inches from the wall. What is the radius of the wheel?