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SSC Sample Paper Mock Test-15 SSC CGL Tear-II Paper-1

  • question_answer
    Directions: In each of the following number series, a wrong number is given. Find out the wrong number.
    3, 7, 15, 39, 63, 127, 255, 511

    A) 15        

    B)  39    

    C)  63

    D)  127

    Correct Answer: B

    Solution :

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


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