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    Question

    Find the wrong no in the given number series. 3,

    7, 15, 31, 63, 127, 255
    A 7 Correct Answer Incorrect Answer
    B 3 Correct Answer Incorrect Answer
    C 63 Correct Answer Incorrect Answer
    D 15 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Observe the pattern: 3 × 2 + 1 = 7 7 × 2 + 1 = 15 15 × 2 + 1 = 31 31 × 2 + 1 = 63 63 × 2 + 1 = 127 127 × 2 + 1 = 255 Hence, there is not wrong no so series is correct

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