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    Question

    In each of the following series, one term is missing.

    Find the missing term. 5, 13, 29, 61, 125, ?
    A 375 Correct Answer Incorrect Answer
    B 245 Correct Answer Incorrect Answer
    C 253 Correct Answer Incorrect Answer
    D 240 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Differences: 13 − 5 = 8 29 − 13 = 16 61 − 29 = 32 125 − 61 = 64 Differences: 8, 16, 32, 64 (each doubles) Next difference = 128 Missing term = 125 + 128 = 253

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