Odd Man Out and Series

Question:
10, 25, 45, 54, 60, 75, 80

[A].

10

[B].

45

[C].

54

[D].

75

Answer: Option C

Explanation:

Each of the numbers except 54 is multiple of 5.

Question:
16, 25, 36, 72, 144, 196, 225

[A].

36

[B].

72

[C].

196

[D].

225

Answer: Option B

Explanation:

Each of the numbers except 72 is a perfect square.

Question:
41, 43, 47, 53, 61, 71, 73, 81

[A].

61

[B].

71

[C].

73

[D].

81

Answer: Option D

Explanation:

Each of the numbers except 81 is a prime number.

Question:
6, 9, 15, 21, 24, 28, 30

[A].

28

[B].

21

[C].

24

[D].

30

Answer: Option A

Explanation:

Each of the numbers except 28, is a multiple of 3.

Question:
1, 4, 9, 16, 23, 25, 36

[A].

9

[B].

23

[C].

25

[D].

36

Answer: Option B

Explanation:

Each of the numbers except 23, is perfect square.

Question: 3, 5, 11, 14, 17, 21
[A].

21

[B].

17

[C].

14

[D].

3

Answer: Option C

Explanation:

Each of the numbers except 14 is an odd number.

The number ’14’ is the only EVEN number.

Question:
10, 14, 16, 18, 21, 24, 26

[A].

26

[B].

24

[C].

21

[D].

18

Answer: Option C

Explanation:

Each of the numbers except 21 is an even number.

Question: 3, 5, 7, 12, 17, 19

[A].19
[B].17
[C].5
[D].12
 
Answer: Option D

Explanation:

Each of the numbers is a prime number except 12.