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      Question

      40 30 20 ? 7.5

      4.375 What should come in place of question mark (?) in the following number series?
      A 10.5 Correct Answer Incorrect Answer
      B 15.5 Correct Answer Incorrect Answer
      C 12.5 Correct Answer Incorrect Answer
      D 9.5 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      (40 × 1.5) ÷ 2 = 30 (30 × 2) ÷ 3 = 20 (20 × 2.5) ÷ 4 = 12.5 (12.5 × 3) ÷ 5 = 7.5 (7.5 × 3.5) ÷ 6 = 4.375

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