exam Maths Puzzle Numerical Ability

Assume that y varies inversely as x. If y = 4 when x = 1/2, find y when x = 2

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exam Other Question

We are trying to find the Greatest Common Factor. Please show the formula for your solution.

25p2q3, 15p2q2, and 356pq4 __________

Thank you for any help you give. Can someone please help me with this one.

Evaluate. 3^-5

A) -15
B) -243
C) 1/243
D) -1/243