book Maths Puzzle Numerical Ability

If x and y are integers, which of the following is NOT necessarily an integer?

(A) 3x-2y
(B) y to the power 5
(C) x to the power y
(D) xy

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book Other Question

Solve the formula for the variable

b+3=f
e 2
Please help me with this problem. The possible answers are A -1188, B -396, C 396, or D 1188. The problem is [(66/(-3)] X (6^2)=