exam Maths Puzzle Numerical Ability

Hi! Can you help me with the problem:

Write an expression for the difference of 4 and the square of a number.

I do not know whether it is 4 - n^2 or n^2 - 4

Thanks. :)

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exam Other Question

2. write a formula that expresses the relationship described below. Use k as a constant of variation.
P varies directly with T

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