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    Question

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

    21, 22, 48, 153, 628,

    ?
    A 3165 Correct Answer Incorrect Answer
    B 4105 Correct Answer Incorrect Answer
    C 4205 Correct Answer Incorrect Answer
    D 4418 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    21 × 1 + 12= 22 22× 2 + 22 = 48 48 × 3 + 32= 153 153 × 4 + 42 = 628 628 × 5 + 52 = 3165

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