book Maths Puzzle Numerical Ability

find p if 93=16-5p

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book Other Question

solve for x:
{{{x^2}}} 5
x 1 = 36

and {{{x^2}}} 5
x 1 are in those long stright up and down lines to make a matrice
with {{{x^2}}} over x and 5 over 1 How would I solve this?:

The Great Pyramid of Cheops has a square base of 756 ft on a side and a height of 481 ft. How many apartments 35 ft x 20 ft x 8 ft would be needed to have a volume equivalent to that of the Great Pyramids?

Thanks!