Find the wrong number in the following series.3, 5, 9, 17, 33, 65, 128
A. 65
B. 128
C. 33
D. 9
1 answer
Best answer
Answer: B. 128
Answer: (B) 128
Rule: ×2 − 1. 3→5→9→17→33→65.
After 65 the term should be 65 × 2 − 1 = 129, so 128 is wrong.
Doubtly AI
· 27 Oct 2026
AI-generated · not yet verified
Report
Was this answer helpful?
Thanks for the feedback.
Sign up free to save answers and ask your own doubts
Your answer
Log in or create a free account to answer this question.