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      Question

      Find the missing term: 3, 7, 15, 31, 63, ?

      A 120 Correct Answer Incorrect Answer
      B 127 Correct Answer Incorrect Answer
      C 113 Correct Answer Incorrect Answer
      D 195 Correct Answer Incorrect Answer

      Solution

      Observe pattern in differences: 7 βˆ’ 3 = 4 15 βˆ’ 7 = 8 31 βˆ’ 15 = 16 63 βˆ’ 31 = 32 Differences are 4, 8, 16, 32 (powers of 2, doubling each time). Next difference = 64 So missing term = 63 + 64 = 127.

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