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    Question

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

    165        155      135      ?      65       15

    A 118 Correct Answer Incorrect Answer
    B 105 Correct Answer Incorrect Answer
    C 128 Correct Answer Incorrect Answer
    D 110 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    165 – 10 = 155 155 – 20 = 135 135 – 30 =  105 105 – 40 = 65 65 – 50 = 15

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