exam Maths Puzzle Numerical Ability

(rs) radical sign

simplify

2(rs)12+4(rs)24

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exam Other Question

Find the constant term that should be added to make the following a perfect square trinomial:
x^2 + 7x
Multiple choice:
a)49
b)49/2
c)7/2
d)49/4

Thank you for your help find the total volume, then the height of a cylinder filled with liquid to 1/2, 1/3, 1/5, 1/6 full.
it has a length of 30m and a base radius of 8m