Number Series Questions & Answers for Logical Reasoning of MPSC | STI | PSI

                                                               

1. Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

A. (2/3)

B. (1/8)

C. (1/8)

D. (1/16)

                                                               

2. Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

A. 12

B. 10

C. 7

D. 13

                                                               

3. Look at this series: 36, 34, 30, 28, 24, ... What number should come next?

A. 26

B. 22

C. 23

D. 20

                                                               

4. Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?

A. 24

B. 22

C. 25

D. 26

                                                               

5. Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?

A. 27

B. 14

C. 12

D. 53

                                                               

Answers:

1-B

Clarification:

It is a division series; every number is one-half of it's previous number.

That is, the number is divided by 2 successively to get the next result.

4/2 = 2

2/2 = 1

1/2 = 1/2

(1/2)/2 = 1/4

(1/4)/2 = 1/8 and so on.

2-B

Clarification:

This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

3-B

Clarification:

This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

4-C

Clarification:

In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

5-B

Clarification:

In this series, each number is repeated, then 13 is subtracted to arrive at the next number.