Elitmus Exam Numerical Ability Number System

If given a set A, then {w,x,y,z} are the four numbers taken from a set A such that (w power x) - (yz) has the maximum value. what is the maximum value?

(a)15 (b)8 (c)9 (d)cannot be determined

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Elitmus Other Question

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ATLAST, i solved this ques in exam!
If the three numbers are such that x>y>z>10,
then the product of xyz value is nearly equal to

(a) xy(z-1.69) (b)x(y-1.69)z (c) (x-1.69)yz
(d)cannot be determined