This Article consist of most important questions of ” Series Completion ” topic that are mostly asked in all competitive exams. We collected these questions from the students who appeared in exams. Now try to solve these questions.

## Series Completion Questions and Answers

**Question : 1 ** 125,80,45,20,?

A. 5

B. 8

C. 10

D. 12

**Show Answer**

**Correct Answer : ** A

**Explanation : **

The pattern is – 45, – 35, – 25, …..

So, missing term = 20 – 15 = 5.

**Question : 2 ** In the series 2, 6, 18, 54, …… what will be the 8th term ?

A. 4370

B. 4374

C. 7443

D. 7434

**Show Answer**

**Correct Answer : ** B

**Explanation : **

Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,…..

So, the series is a G.P. in which a = 2, r = 3.

Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374.

**Question : 3** 3, 10, 101,?

A. 10101

B. 10201

C. 10202

D. 11012

**Show Answer**

**Correct Answer : ** C

**Explanation : **

Each term in the series is obtained by adding 1 to the square of the preceding term.

So, missing term = (101)2 + 1 = 10202

**Question : 4** 589654237, 89654237, 8965423, 965423, ?

A. 58965

B. 65423

C. 89654

D. 96542

**Show Answer**

**Correct Answer : ** D

**Explanation : **

The digits are removed one by one from the beginning and the end in order alternately

so as to obtain the subsequent terms of the series.

**Question : 5** 120, 99, 80, 63, 48, ?

A. 35

B. 38

C. 39

D. 40

**Show Answer**

**Correct Answer : ** A

**Explanation : **

The pattern is – 21, – 19, – 17, – 15,…..

So, missing term = 48 – 13 = 35.