WBCS.LIVE practice question

Find the next term in the series: 3, 7, 15, 31, 63, ?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 95
  2. 127
  3. 125
  4. 111

Correct answer and explanation

Correct answer: 127

Explanation: āœ… Correct Answer: (B) 127 šŸ“š Explanation: Step-1: Identify the pattern. 3 x 2 + 1 = 7; 7 x 2 + 1 = 15; 15 x 2 + 1 = 31; 31 x 2 + 1 = 63. Step-2: Apply the same logic to the last term. 63 x 2 + 1 = 126 + 1 = 127. (Alternatively: The differences are 4, 8, 16, 32... next difference is 64. 63 + 64 = 127).