# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Odd Man Out (Q.No. 1)
Directions to Solve
Find the odd man out.

1.
3, 5, 11, 14, 17, 21
21
17
14
3
Explanation:

Each of the numbers except 14 is an odd number.

The number '14' is the only EVEN number.

Discussion:
36 comments Page 1 of 4.

Sneha gupta said:   4 months ago
(1)^2 = 1 + 2 = 3.
(2)^2 = 4 + 1 = 5.
(3)^2 = 9 + 2 = 11.
(4)^2 = 16 + 1 = 17.
(5)^2 = 25 + 2 = 27.
So, 21 will be the correct answer.
(5)

Vijaya said:   7 months ago
(2)

Vaneet said:   2 years ago
14 is the correct.
(6)

Dayal.K said:   4 years ago
Option: C.

Because all the numbers are an odd number, But 14 is an even number.
(5)

Vasudha said:   4 years ago
14 is the answer because it is not an prime number.
(4)

Sejal said:   4 years ago
0 + 3 = 3
0 + 5 = 5
1 + 4 = 5
1 + 2 = 3
1 + 1 = 2
1 + 7 = 8

Except 17 all have sum prime no. So 17 should be the answer.
(5)

Deepthi said:   4 years ago
14 is the answer because it is an even number.
(1)

Princess said:   5 years ago
Why is co-prime no H.C.F is always 1?
(2)

Mallikharjunudu said:   6 years ago
Why not 21?
(1)