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Direction: What should come in place of question mark (?) in the following number series?

  1. 8, 31, 122, 485, 1936, 7739, ?
    1. 30950
    2. 46430
    3. 34650
    4. 42850
    5. 38540
Correct Option: A

The series is x 4 -1, x 4 - 2, x 4 - 3, x 4 - 4, ....,


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