odd man out of series aptitude questions

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.

1, 4, 9, 16, 20, 36, 49

A.	1	B.	9
C.	20	D.	49

Answer: Option C

Explanation:

The pattern is 1², 2², 3², 4², 5², 6², 7². But, instead of 5², it is 20 which to be turned out.

2, 5, 10, 17, 26, 37, 50, 64

A.	50	B.	26
C.	37	D.	64

Answer: Option D

Explanation:

(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1

But, 64 is out of pattern.

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.

10.

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.