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      Question

      Select the number from among the given options that can

      replace the question mark (?) in the following series. 1, 3, 7, 15, 31, 63, ?
      A 143 Correct Answer Incorrect Answer
      B 126 Correct Answer Incorrect Answer
      C 127 Correct Answer Incorrect Answer
      D 131 Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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