Question

    111(16 - 1) is divisible by

    A 50 Correct Answer Incorrect Answer
    B 54 Correct Answer Incorrect Answer
    C 56 Correct Answer Incorrect Answer
    D 43 Correct Answer Incorrect Answer

    Solution

    Remember that an-bn is always divisible by a+b when n is even. Hence 11116 -1 means111 16-1 16will be divisible by (111+1) or 112. Hence, by options, we can say that (111 16-1) is divisible by 56.

    Practice Next