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Discussion :: Number Series

  1. 563, 647, 479, 815, ?

    2. A.

     672
    B.

     386
    C.

     279
    D.

     143

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    Answer : Option D

    Explanation :

    The pattern is + 84, - 168, + 336,.....i.e. + 84, - (84 x 2), + (84 x 22), .....
    So, missing term = 815 - (84 x 23) = 815 - 672 = 143.

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