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    Question

    Select the number from among the given options that can

    replace the question mark (?) in the following series. 1, 3, 7, 15, 31, 63, ?
    A 143 Correct Answer Incorrect Answer
    B 126 Correct Answer Incorrect Answer
    C 127 Correct Answer Incorrect Answer
    D 131 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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