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    Question

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

    342      252      172      102      42   

      ?
    A -4 Correct Answer Incorrect Answer
    B -6 Correct Answer Incorrect Answer
    C -8 Correct Answer Incorrect Answer
    D -10 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    342 – 90 = 252 252 – 80 = 172 172 – 70 = 102 102 – 60 = 42 42 – 50 = -8

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