# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Pick Wrong No. (Q.No. 15)
Directions to Solve
Find out the wrong number in the given sequence of numbers.

15.
25, 36, 49, 81, 121, 169, 225
36
49
121
169
Explanation:

The numbers are squares of odd natural numbers, starting from 5 up to 15.

So, 36 is wrong.

Discussion:
10 comments Page 1 of 1.

HeBro said:   3 years ago
36 is the only even number.
(2)

139, 152, 160, 160, 181, 191, 202.

Find the wrong no.
(1)

Ashutosh said:   7 years ago
6 is the only even number in the series of the square pattern.
(1)

Jay said:   7 years ago
6*6 is the only even number.
(1)

Kowsi said:   8 years ago
25 = 5 * 5 : 5,
36 = 6 * 6 : 6,
49 = 7 * 7 : 7,
81 = 9 * 9 : 9,
121 = 11 * 11 : 11,
169 = 13 * 13 : 13,
225 =15 * 15 : 15.

5, 7, 9, 11, 13, 15 are an odd number but 6 is an even number. So 36 is the answer.
(3)

Krishnendu Chakraborty said:   10 years ago
36 is also the lone even number in the given series. All the other numbers are odd. Hence, 36 is the answer.
(1)

Rakesh Meshram said:   1 decade ago
25=5*5 :5
36=6*6 :6
49=7*7 :7
81=9*9 :9
121=11*11 :11
169=13*13 :13
225=15*15 :15

There is use 5,7,9,11,13,15.. square series but 6*6+36 is not correct in this series so 36 is wrong answer.
(1)