Verbal Reasoning - Series Completion

Directions to Solve

In this type of questions, one term in the number series is wrong. Find out the wrong term.


1.
121, 143, 165, 186, 209
143
165
186
209
Answer: Option
Explanation:

Each term in the series is obtained by adding 22 to the preceding term.

So, 186 is wrong and must be replaced by (165 + 22) i.e. 187.


2.
6, 15, 35, 77, 165, 221
35
77
165
15
Answer: Option
Explanation:

The terms of the series are products of two consecutive prime numbers i.e. (2 x 3),

(3 x 5), (5 x 7), (7 x 11),.....

So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.


3.
8, 13, 21, 32, 47, 63, 83
13
21
32
47
Answer: Option
Explanation:

The correct pattern is + 5, + 8, + 11, + 14,.....

So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.


4.
1, 2, 4, 8, 16, 32, 64, 96
4
32
64
96
Answer: Option
Explanation:

Each term of the series is obtained by multiplying the preceding term by 2.

So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.


5.
3, 4, 10, 32, 136, 685, 4116
10
32
136
4116
Answer: Option
Explanation:

The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....

So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.