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      Question

      What will come in

      place of the question mark (?) in the following series? 55, 70, 45, 80, ?, 90
      A 30 Correct Answer Incorrect Answer
      B 35 Correct Answer Incorrect Answer
      C 40 Correct Answer Incorrect Answer
      D 45 Correct Answer Incorrect Answer
      E 50 Correct Answer Incorrect Answer

      Solution

      The given series follows the following pattern:

      55 + 15 = 70

      70 − 25 = 45

      45 + 35 = 80

      80 − 45 = 35

      35 + 55 = 90

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