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    Question

    6 ? 15 42 106 231

    What should come in place of question mark (?) in the following number series?
    A 12 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 9 Correct Answer Incorrect Answer
    D 7 Correct Answer Incorrect Answer
    E 14 Correct Answer Incorrect Answer

    Solution

    6+1³ = 7, 7 +2³ = 15, 15 +3³ = 42, 42 + 4³ = 106, 106 +5³ = 231

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