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Discussion :: Number Series

  1. Find out the wrong term: 3, 7, 15, 39, 63, 127, 255, 511

  2. A.

     15

    B.

     39

    C.

     63

    D.

     127

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    Answer : Option B

    Explanation :

    The correct pattern is × 2 + 1.
    So, 39 is wrong and must be replaced by (15 × 2 + 1) i.e., 31.


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