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Discussion :: Odd Man Out and Series

  1. 3, 7, 15, 39, 63, 127, 255, 511

    2. A.

    7
    B.

    15
    C.

    39
    D.

    63
    E.

    127

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    Answer : Option C

    Explanation :

    Go on multiplying 2 and adding 1 to get the next number.

    So, 39 is wrong.

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