Question

    What will come in place of the question mark (?) in the following series?

    12      18      31     51     ?     112

    A 92 Correct Answer Incorrect Answer
    B 101 Correct Answer Incorrect Answer
    C 78 Correct Answer Incorrect Answer
    D 86 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    12               18             31             51              78             112         +6               +13           +20         +27           +34                   +7               +7            +7            +7

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