What is the next term in the logical number sequence: 3, 7, 15, 31, 63, ...?

Answer and explanation

Correct answer: C. 127

  1. Step 1: Pattern analysis: each term is 2 * previous + 1, or 2^(n+1) - 1.
  2. Step 2: 3 = 2^2 - 1, 7 = 2^3 - 1, 15 = 2^4 - 1, 31 = 2^5 - 1, 63 = 2^6 - 1.
  3. Step 3: Next term = 2^7 - 1 = 128 - 1 = 127.

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