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    Question

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

    30, 39, 66, ? , 174,

    255
    A 99 Correct Answer Incorrect Answer
    B 100 Correct Answer Incorrect Answer
    C 101 Correct Answer Incorrect Answer
    D 111 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    30 + 9 × 1 = 39 39 + 9 × 3 = 66 66 + 9 × 5 = 111 111 + 9 × 7 = 174 174 + 9 × 9 = 255

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