exam Maths Puzzle Numerical Ability

How do I simplify the expression (x^2/x^-5)^-3?

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exam Other Question

Write an expression that is equivalent to the following expressions

(10*5)*20 (associative of multiplication)
The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm. What are the dimensions (length and width) of the rectangle?

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