Find the wrong number in the series.
1, 2, 6, 15, 31, 56, 91
A) 31B) 15C) 56D) 91
Find out the wrong number in the series
Answer: D) 91
Explanation:
The difference of the two consecutive numbers are 1, 4, 9, 16, 25, 35.
This is clearly , +(12), +(22), +(32), +(42), +(52),+(62)+12, +22, +32, +42, +52,+62
Here 35 is wrong, So our wrong number is 91
Subject: Number Series – Verbal Reasoning – Mental Ability