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    Question

    Find the wrong number in the given number series.

    1, 3, 10, 21, 64, 129, 356, 777
    A 21 Correct Answer Incorrect Answer
    B 129 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 356 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Clearly the series pattern is:   x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,..... So, 356 is wrong and must be replaced by (129 x 3 + 1) i.e. 388

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