odd man out of series aptitude questions

11.

331, 482, 551, 263, 383, 362, 284

A.	263	B.	383
C.	331	D.	551

Answer: Option B

Explanation:

In each number except 383, the product of first and third digits is the middle one.

12.

835, 734, 642, 751, 853, 981, 532

A.	751	B.	853
C.	981	D.	532

Answer: Option A

Explanation:

In each number except 751, the difference of third and first digit is the middle one.

13.

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.

14.

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.