- A63
- B15
- C31
- D128
Step-by-Step Solution
The rule is ×2 + 1, giving 3, 7, 15, 31, 63, 127; so 128 is wrong and should be 127.
Answer: D) 128
Identify the wrong term in the series: 3, 7, 15, 31, 63, 128
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