One term in the number series is wrong. Find out the wrong term.
3, 7, 15, 39, 63, 127, 255, 511
A. 15
B. 39
C. 63
D. 127
Answer: Option B
Solution(By Examveda Team)
The correct pattern is x 2 + 1.So, 39 is wrong and must be replaced by (15 x 2 + 1) i.e. 31.
Related Questions on Series Completion
Join The Discussion