Home » Aptitude » Odd Man Out and Series

15, 31, 63, 127, 255, (....)

Correct Answer: 511

Explanation:

Each number is double the preceding one plus 1.


So, the next number is (255 x 2) + 1 = 511.


← Previous Question Next Question→

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion