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GMATprep: of the following, which is greatest?

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by ssmiles08 » Thu Jun 25, 2009 5:54 pm
anytime you have a negative power like the question above...you take the reciprocal of the number.

so (A) has (1/5)^-2 = 5^2

similarly the case with B. it becomes 3^2.

C, and D become fractions b/c of the negative powers.

E = 8, but is still less than A which is 25.

(A)
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by nhai2003 » Thu Jun 25, 2009 6:10 pm
sorry I mistook "greatest" with "smallest".
Now I understand why.
Thanks Ssmile!
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