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    Question

    In each of the following number series, one term is

    wrong. Find the wrong term. 5, 13, 29, 61, 125, 249, 509
    A 29 Correct Answer Incorrect Answer
    B 249 Correct Answer Incorrect Answer
    C 509 Correct Answer Incorrect Answer
    D 13 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Pattern is x 2 + 3 5 x 2 + 3 = 13 13 x 2 + 3 = 29 29 x 2 + 3 = 61 61 x 2 + 3 = 125 125 x 2 + 3 = 253 253 x 2 + 3 = 509 So the correct series should be: 5, 13, 29, 61, 125, 253, 509 Hence, 249 is the wrong term.

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