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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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