Find the missing number in the sequence: 3, 7, 15, 31, 63, ?
A125
B127
C128
D131
Explanation
Each term is 2 * previous term + 1: (63 * 2) + 1 = 126 + 1 = 127.
Exam Relevance
- Topic: Number Series
- Subtopic: Exponential Patterns
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