Verbal Reasoning - Series Completion

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.

16. 

2, 5, 9, ?, 20, 27

A. 14
B. 16
C. 18
D. 24

Answer: Option A

Explanation:

The pattern is + 3, + 4, + 5, + 6,.....

So, missing term = 9 + 5 = 14.


17. 

2, 3, 3, 5, 10, 13, ?, 43, 172, 177

A. 23
B. 38
C. 39
D. 40

Answer: Option C

Explanation:

The pattern is + 1, x 1, + 2, x 2, + 3, x 3, + 4, x 4, + 5.

So, missing term = 13 x 3 = 39.


18. 

9, 27, 31, 155, 161, 1127, ?

A. 316
B. 1135
C. 1288
D. 2254

Answer: Option B

Explanation:

The pattern is x 3, + 4, x 5, + 6, x 7,.....

So, missing term = 1127 + 8 = 1135.


19. 

2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?

A. 9
B. 10
C. 11
D. 12

Answer: Option B

Explanation:

The given sequence is a combination of three series :

I. 1st, 4th, 7th, 10th, 13th terms i.e. 2, 4, 6, 8, ?

II. 2nd, 5th, 8th, 11th terms i.e. 1, 4, 7, 10

III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11

Clearly, I consists of consecutive even numbers. So, the missing term is 10.


20. 

Which of the following will not be a number of the series 1, 8, 27, 64, 125,.....?

A. 256
B. 512
C. 729
D. 1000

Answer: Option A

Explanation:

The given series consists of cubes of natural numbers only. 256 is not the cube of

any natural number.