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Discussion :: Number Series

  1. What will come at the place of question mark ?
    7, 11, 19, 35, 67, ?

    2. A.

     99
    B.

     131
    C.

     137
    D.

     124

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    Answer : Option B

    Explanation :

    Logic:
    Last Term *2 - 3 = Next Term.
    First Term = 7
    Second Term = 7 * 2 -3 = 11
    Third Term = 11 * 2 - 3 = 19
    Fourth Term = 19 * 2 - 3 = 35
    Fifth Term = 35 * 2 - 3 = 67
    Sixth Term = 67 * 2 -3 = 131

    Alternative Explanation :
    Last term + 2n = Next Term
    First Term = 7
    Second Term = 7 + 22 = 11
    Third Term = 11 + 23 = 19
    Fourth Term = 19 + 24 = 35
    Fifth Term = 35 + 25 = 67
    Sixth Term = 67 + 26 = 131

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