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    Question

    15, 8, 9, 20,

    ? A series is given in which one term is missing, choose the correct alternate from the given options to complete the series.
    A 42 Correct Answer Incorrect Answer
    B 84 Correct Answer Incorrect Answer
    C 72 Correct Answer Incorrect Answer
    D 63 Correct Answer Incorrect Answer

    Solution

    15 x 0.5 + 0.5 = 8 8 x 1 + 1 = 9 9 x 2 + 2 = 20 So, 20 x 4 + 4 = 84

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