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    Question

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

    11      6      7      12      26     

     ?       205.5
    A 72.5 Correct Answer Incorrect Answer
    B 62.5 Correct Answer Incorrect Answer
    C 65 Correct Answer Incorrect Answer
    D 67.5 Correct Answer Incorrect Answer

    Solution

    11 x 0.5 + 0.5 = 6  6 x 1 + 1 = 7  7 x 1.5 + 1.5 = 12 12 x 2 + 2 = 26 26 x 2.5 + 2.5 = 67.5   67.5 x 3 + 3 = 205.5

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