• India’s No.1 Educational Platform For UPSC,PSC And All Competitive Exam
• 3
• Donate Now
• My Order
Odd Man Out and Series
1.3, 5, 11, 14, 17, 21

Explanation:

Solution:
Each of the numbers except 14 is an odd number.
The number '14' is the only EVEN number.

2.8, 27, 64, 100, 125, 216, 343

Explanation:

Solution:
The pattern is 23, 33, 43, 53, 63, 73. But, 100 is not a perfect cube.

3.10, 25, 45, 54, 60, 75, 80

Explanation:

Solution:
Each of the numbers except 54 is multiple of 5.

4.6, 9, 15, 21, 24, 28, 30

Explanation:

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

5.1, 4, 9, 16, 23, 25, 36

Explanation:

Solution:
Each of the numbers except 23, is perfect square.

6.1, 4, 9, 16, 20, 36, 49

Explanation:

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

7.2, 5, 10, 17, 26, 37, 50, 64

Explanation:

Solution:
(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.

8.16, 25, 36, 72, 144, 196, 225

Explanation:

Solution:
Each of the numbers except 72 is a perfect square.

9.331, 482, 551, 263, 383, 362, 284

Explanation:

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

10.835, 734, 642, 751, 853, 981, 532