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Discussion :: Number Series

  1. Find out the wrong term: 5, 27, 61, 122, 213, 340, 509

  2. A.

     27

    B.

     61

    C.

     122

    D.

     509

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    Answer : Option A

    Explanation :

    We have :
    I: 5       27       61       122       213       340     509
    II:  22       34       61         91       127     169
    III:        12        27        30        36       42
    IV:            15        3         6     ;       6           
    Clearly, the given series becomes a triangular pattern series if each term in IV: is 6.
    Again, in II: 34 must be replaced by (61 - 24) i.e., 37 and 22 by (37 - 18) i.e., 19.
    Thus, in the given series, 27 is wrong and must be replaced by (5 + 19) i.e., 24.


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