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Discussion :: Number Series

  1. 4, 7, 25, 10, __, 20, 16, 19. What number should fill the blank?

    2. A.

     13
    B.

     15
    C.

     20
    D.

     28

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    Answer : Option A

    Explanation :

    Two series alternate here, with every third number following a different pattern. In the main series, 3 is added to each number to arrive at the next. In the alternating series, 5 is subtracted from each number to arrive at the next.

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