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  1. What will come at the place of question mark ?
    165, 195, 255, 285, 345, ?

    2. A.

     390
    B.

     420
    C.

     435
    D.

     375
    E.

     Two answer out of four option

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    Answer : Option E

    Explanation :

    Explanation 1: Each number of given series is 15 multiplied by a prime number.
    15*11, 15*13, 15*17, 15*19, 15*23.
    So, Missing number is
    15*29 = 435.

    Explanation 2: This pattern is +30 and then +60 also follow for the give series.
    165+30=195,
    195+60=255,
    255+30=285,
    285+60=345,
    345+30=375

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