Aptitude - Odd Man Out and Series

Exercise : Odd Man Out and Series - Pick Wrong No.
Directions to Solve
Find out the wrong number in the given sequence of numbers.

6.
52, 51, 48, 43, 34, 27, 16
27
34
43
48
Answer: Option
Explanation:

Subtract 1, 3, 5, 7, 9, 11 from successive numbers.

So, 34 is wrong.


7.
4, 6, 8, 9, 10, 11, 12
10
11
12
9
Answer: Option
Explanation:

Each number is a composite number except 11.


8.
105, 85, 60, 30, 0, -45, -90
0
85
-45
60
Answer: Option
Explanation:

Subtract 20, 25, 30, 35, 40, 45 from successive numbers.

So, 0 is wrong.


9.
5, 16, 6, 16, 7, 16, 9
9
7
6
None of these
Answer: Option
Explanation:

Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.

So, 9 is wrong.


10.
125, 127, 130, 135, 142, 153, 165
130
142
153
165
Answer: Option
Explanation:

Prime numbers 2, 3, 5, 7, 11, 13 are to be added successively.

So, 165 is wrong.