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    Question

    Select the number from among the given options that can

    replace the question mark β€˜?’ in the following series. 11, 15, 23, 39, β€˜?’, 135
    A 71 Correct Answer Incorrect Answer
    B 59 Correct Answer Incorrect Answer
    C 77 Correct Answer Incorrect Answer
    D 62 Correct Answer Incorrect Answer

    Solution

    11 + 4 = 15 15 + 8 = 23 23 + 16 = 39 39 + 32 = 71 71 + 64 = 135

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