Number Series Question

Important Number Series Question that is mostly asked in Bank/Railway/SBI/IBPS and other competitive examinations are given here. Along with, Number Series Questions and Answer, explanation of each one is also given. So, if any individual is not able to solve the series, then they can look out at the given solution to know the tricks or pattern of solving.

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Number Series Questions PDF With Solution is also available to download in the last section of this page. So, scroll down this page and download Number Series Question and Answer PDF.

Number Series Question

In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much.

Question 1) Look at this series: 53, 53, 40, 40, 27, 27, … What number should come next?

1. 12
2. 14
3. 27
4. 53

Answer 1) 14

Solution:

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

Question 2)    Look at this series: 31, 29, 24, 22, 17, … What number should come next?

1. 15
2. 14
3. 13
4. 12

Answer 2) 15

Solution:

This is a simple alternating subtraction series, which subtracts 2, then 5.

Question 3)   Look at this series: 544, 509, 474, 439, … What number should come next?

1. 404
2. 414
3. 420
4. 445

Answer 3) 404

Solution:

This is a simple subtraction series. Each number is 35 less than the previous number.

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Question 4) Look at this series: 8, 6, 9, 23, 87 , … What number should come next?

1. 128
2. 226
3. 324
4. 429

Answer 4) 429

Solution:

8 x 1 – 2 = 6
6 x 2 – 3 = 9
9 x 3 – 4 = 23
23 x 4 – 5 = 87
87 x 5 – 6 = 429 …

Question 5) Look at this series: 22, 21, 23, 22, 24, 23, … What number should come next?

1. 22
2. 24
3. 25
4. 26

Answer 5) 25

Solution:

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

Question 6) Look at this series: 8, 22, 8, 28, 8, … What number should come next?

1. 9
2. 29
3. 32
4. 34

Answer 6) 34

Solution:

This is a simple addition series with a random number, 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number.

Question 7) Look at this series: 201, 202, 204, 207, … What number should come next?

1. 205
2. 208
3. 210
4. 211

Answer 7) 211

Solution:

In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.

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Question 8) Look at this series: 5.2, 4.8, 4.4, 4, … What number should come next?

1. 3
2. 3.3
3. 3.5
4. 3.6

Answer 8) 3.6

Solution:

In this simple subtraction series, each number decreases by 0.4.

Question 9) Look at this series: 36, 34, 30, 28, 24, … What number should come next?

1. 20
2. 22
3. 23
4. 26

Answer 9) 22

Solution:

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

Question 10) Look at this series: 3, 4, 7, 8, 11, 12, … What number should come next?

1. 7
2. 10
3. 14
4. 15

Answer 10) 15

Solution:

This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.

Question 11) Look at this series: 2, 4, 6, 8, 10, … What number should come next?

1. 11
2. 12
3. 13
4. 14

Answer 11) 12

Solution:

This is a simple addition series. Each number increases by 2.

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Question 12) Look at this series: 5.2, 4.8, 4.4, 4, … What number should come next?

1. 3
2. 3.3
3. 3.5
4. 3.6

Answer 12) 3.6

Solution:

In this simple subtraction series, each number decreases by 0.4.

Question 13) Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next?

1. 7
2. 10
3. 12
4. 13

Answer 13) 10

Solution:

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

Question 14) Look at this series: 58, 52, 46, 40, 34, … What number should come next?

1. 26
2. 28
3. 30
4. 32

Answer 14) 28

Solution:

This is a simple subtraction series. Each number is 6 less than the previous number.

Question 15) Look at this series: 14, 28, 20, 40, 32, 64, … What number should come next?

1. 52
2. 56
3. 96
4. 128

Answer 15) 56

Solution:

This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.

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Question 16) Look at this series: 2, 6, 18, 54, … What number should come next?

1. 108
2. 148
3. 162
4. 216

Answer 16) 162

Solution:

This is a simple multiplication series. Each number is 3 times more than the previous number.

Question 17) Look at this series: 2, 1, (1/2), (1/4), … What number should come next?

1. (1/3)
2. (1/8)
3. (2/8)
4. (1/16)

Answer 17) (1/8)

Solution:

This is a simple division series; each number is one-half of the previous number.

In other terms to say, 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.

Question 18) Look at this series: 21, 9, 21, 11, 21, 13, 21, … What number should come next?

1. 14
2. 15
3. 21
4. 23

Answer 18) 15

Solution:

In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.

Question 19) Look at this series: 1.5, 2.3, 3.1, 3.9, … What number should come next?

4. 4.2
5. 4.4
6. 4.7
7. 5.1

Answer 19) 4.7

Solution:

In this simple addition series, each number increases by 0.8.

Download: Number Series Questions PDF With Solution

Question 20) Look at this series: 80, 10, 70, 15, 60, … What number should come next?

1. 20
2. 25
3. 30
4. 50

Answer 20) 20

Solution:

This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

Number Series Question given on this page of recruitmentresult.com follows a logical rule or pattern and to solve these types of questions, candidates need to analyze the pattern. So, start practicing from here and improve your performance.

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