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Discussion :: Number Series

  1. In the series 2, 6, 18, 54, ...., what will be the 8th term ?

    2. A.

     4370
    B.

     4374
    C.

     7443
    D.

     7434

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    Answer : Option B

    Explanation :

    Clearly, 2 × 3 = 6, 6 × 3 = 18, 18 × 3 = 54,..............
    S, the series is a G.P. in which a = 2, r = 3
    ∴8th term = ar(8 - 1)= ar7 = 2 × 37 = (2 × 2187) = 4374

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