Home » Aptitude » Odd Man Out and Series

In the following number series only one number is wrong. Find out the wrong number ? 6, 15, 35, 63, 143, 221, 323

Correct Answer: 63

Explanation:

Here the series follows the pattern that, product of succesive prime numbers i.e,


 2 × 3 = 6


 3 × 5 = 15


 5 × 7 = 35


 7 × 11 = 77


 11 × 13 = 143


 13 × 17 = 221


 17 × 19 = 323


So here in place of 77 the number 63 is written.


So the wrong number is 63.


← Previous Question Next Question→

Discussion & Comments

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