exam Maths Puzzle Numerical Ability

use the power property to rewrite the expression log5(125)

is this right?
------3
log5 5
-----5
3log5 =3

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exam Other Question

Could you please help me solve this, Thank you.

Given U = {All letters of the alphabet} A = {b, c, d} and B = {c, e, f, g}
List the elements of set
(a) A U B (b) A &#87
May I please have some help with equation: h/4 = -16