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Which of the following numbers will completely divide (325 + 326 + 327 + 328)?

Correct Answer: 30

Explanation:

(3 25 + 3 26 + 3 27 + 3 28 ) = 3 25 x (1 + 3 + 3 2 + 3 3 ) = 3 25 x 40

     = 324 x 3 x 4 x 10


     = (324 x 4 x 30), which is divisible by30.


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