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    Question

    8 17 49 199 991 6 a b c

    ? (Q.61 - 65): What should come in place of the question mark (?) in the following number series?
    A 751 Correct Answer Incorrect Answer
    B 732 Correct Answer Incorrect Answer
    C 731 Correct Answer Incorrect Answer
    D 721 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    8 x 2 + 1 = 17, 17 x 3 - 2 = 49, 49 x 4 + 3 = 199, 199 x 5 - 4 = 991, similary, 6 x 2 + 1 = 13, 13 x 3 - 2 = 37, 37 x 4 + 3 = 151, 151 x 5 - 4 = 751

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