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      Question

      Select the number from among the given option that can

      replace the question mark (?) in the following series. 17, 18, 22, 31, 47, 72, ?
      A 101 Correct Answer Incorrect Answer
      B 108 Correct Answer Incorrect Answer
      C 112 Correct Answer Incorrect Answer
      D 117 Correct Answer Incorrect Answer

      Solution

      17 + 1Β² = 18 18 + 2Β² = 22 22 + 3Β² = 31 31 + 4Β² = 47 47 + 5Β² = 72 72 + 6Β² = 108

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