Question

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

    7 7 28 252

    ?
    A 3456 Correct Answer Incorrect Answer
    B 3340 Correct Answer Incorrect Answer
    C 3204 Correct Answer Incorrect Answer
    D 4032 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    × 12 ,× 22,× 32,× 42, .......

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