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  1. Which of the following numbers will completely divide (4915 - 1) ? 

    2. A.

    8
    B.

    14
    C.

    46
    D.

    50

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    Answer : Option A

    Explanation :

    (xn - 1) will be divisibly by (x + 1) only when n is even.

    (4915 - 1) = {(72)15 - 1} = (730 - 1), which is divisible by (7 +1), i.e., 8.

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