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    Question

    5 10 40 80 320 640 4 a b c d e Find the

    value of d. In each of the following questions, a number series is given. After the series a number is given followed by (a), (b), (c), (d) and (e). You have to complete the series starting with the number given following the sequence of the given series.
    A 172 Correct Answer Incorrect Answer
    B 180 Correct Answer Incorrect Answer
    C 256 Correct Answer Incorrect Answer
    D 182 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    The pattern of the first line series is obtained as: × 2, × 4, × 2, × 4, × 2 Therefore, the second line series can be completed on the basis of the same pattern as: 4, a = 4 × 2, b = 8 × 4, c = 32 × 2, d = 64 × 4 Hence, the value of d is 256

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