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Is x divisible by 30?

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Is x divisible by 30?

Post Mon Sep 25, 2017 6:10 pm
Is x divisible by 30?

(1) x = k*(m^3 - m), where m and k are both integers > 9
(2) x = n^5 - n, where n is an integer > 9

B is the OA.

How can I get a conclusion here? Should I try with examples?

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