exam Maths Puzzle Numerical Ability

Write the ratio 5 to 9 as a fraction.
Would this simply be 5/9? I hope.

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exam Other Question

If ABCD is a rectangle and P is any point in its interior, prove that:
(AP)(AP)+(PC)(PC)=(PB)(PB)+(PD)(PD) Why is population shape of concern when estimating a mean? What does sample size have to do
with it?