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Discussion :: Number Series

  1. Find the missing term: 2, 9, 28, ?, 126, 126, 217, 344

    2. A.

     50
    B.

     65
    C.

     70
    D.

     82

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    Answer : Option B

    Explanation :

    The given series is a triangular pattern series.
    So, we have
    Series I :  2     9     28     ?
                    126   217    344
    Series II :  7     19     ?
                    ?   91    127
    Series III :       12     ?     ?
                    ?   36
    Clearly, to form a pattern, the missing terms in Series III must be 18, 24, 30
    So, missing term
    = 127 + (61 + 24 + 6)
    = 127 + 91
    = 218

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