Find out the wrong number in the given sequence of numbers.
1, 2, 6, 15, 31, 56, 91 Answers:
A) 22
B) 91
C) 37
D) 28
E) 21
Explanation:   1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92   Last number of given series must be 92 not 91.   Answer: 91) 91
<result>B</result>
Find out the wrong number in the given sequence of numbers.
1, 2, 6, 15, 31, 56, 91