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Discussion :: Number Series

  1. 6, 18, 3, 21, 7, 56, ?

    2. A.

     8
    B.

     9
    C.

     63
    D.

     64

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    Answer : Option A

    Explanation :

    Each term at an even place in the series is the product of its two adjacent terms.
    Thus, if the missing term be x, then we have : 7 x x = 56 or x = 56 ÷ 7 = 8.

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