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Discussion :: Number Series

  1. Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

    2. A.
    20
    B.
    25
    C.
    30
    D.
    50

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    Answer : Option A

    Explanation :

    This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

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