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    Question

    2.5, 5, 15, 60, ?, 1800,

    12600  What will come in place of the question mark (?) in the following series?
    A 320 Correct Answer Incorrect Answer
    B 400 Correct Answer Incorrect Answer
    C 220 Correct Answer Incorrect Answer
    D 300 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    2.5 X 2 = 5 5 X 3 = 15 15 X 4 = 60 60 X 5 = 300 300 X 6 = 1800 1800 X 7 = 12600

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