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    Question

    Select the number that can replace the question mark (?)

    in the following series. 
    A 165 Correct Answer Incorrect Answer
    B 151 Correct Answer Incorrect Answer
    C 135 Correct Answer Incorrect Answer
    D 168 Correct Answer Incorrect Answer

    Solution

    The pattern followed here is: In Column I: (30 × 6 – 30) = (180 – 30) = 150 In Column III: (12 × 10 - 12) = (120 - 12) = 108 Similarly, In Column II: (15 ×12 - 15) = (180 - 15) = 165

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