30 + Series Questions and Answers | Nonverbal Reasoning

In India, the Non Verbal Reasoning portion of competitive exams frequently includes questions on number series. These kinds of questions consist of a succession of numbers and a blank that needs to be filled in. It is your job to identify the pattern between the numbers, their predecessor, and their successor to get the solution to the blank. Although it might seem easy, it can be difficult to understand the reasoning behind the pattern.

We have included practice questions below so that applicants can get ready for these exams and do well. The blog includes questions as well as some approaches to answering a number series problem.

Topic	Description
What is Series in Non Verbal Reasoning?	Reasoning in competitive exams means deducing conclusions or making decisions based on facts by applying logic to the situation. Candidates’ ability to reason logically and form inferences is tested in the reasoning section of the exam.
Types of Series Non Verbal Reasoning Questions:	Series with an increasing difference Series with decreasing difference Series with a constant differencePerfect squares and cubes of numbers’ series Miscellaneous series
Importance of Series Reasoning Practice Set:	Assess analytical thinking abilities for competitive exams in India like Bank Exams, LIC (AAO), RRB, CAT, Management Exams, UPSC CSAT, State PSC Exams, SSC (CGL, Steno)

Practice Series Questions and Answers | Nonverbal Reasoning

Following we have listed several questions related to series in logical reasoning;

Directions for Q1-Q5: 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

Q1. 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)

Q2. Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next?

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

Q3. Look at this series: 36, 34, 30, 28, 24, … What number should come next?

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

Q4. Look at this series: 22, 21, 23, 22, 24, 23, … What number should come next?

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

Q5. Look at this series: 53, 53, 40, 40, 27, 27, … What number should come next?

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

Directions for Q6-Q10: Look carefully for the pattern, and then choose which pair of numbers comes next.

Q6.28 25 5 21 18 5 14

1. 11 5
2. 10 7
3. 11 8
4. 5 10
5. 10 5

Q7.8 11 21 15 18 21 22

1. 25 18
2. 25 21
3. 25 29
4. 24 21
5. 22 26

Q8.9 16 23 30 37 44 51

1. 59 66
2. 56 62
3. 58 66
4. 58 65
5. 54 61

Q9.2 8 14 20 26 32 38

1. 2 46
2. 44 50
3. 42 48
4. 40 42
5. 32 26

Q10. 9 11 33 13 15 33 17

1. 19 33
2. 33 35
3. 33 19
4. 15 33
5. 19 21

Directions for Q16-Q20: Look carefully for the pattern, and then choose which pair of numbers comes next.

Q11.42 40 38 35 33 31 28

1. 25 22
2. 26 23
3. 26 24
4. 25 23
5. 26 22

Q12.6 10 14 18 22 26 30

1. 36 40
2. 33 37
3. 38 42
4. 34 36
5. 34 38

Q13.8 12 9 13 10 14 11

1. 14 11
2. 15 12
3. 8 15
4. 15 19
5. 8 5

Q14.36 31 29 24 22 17 15

1. 13 11
2. 10 5
3. 13 8
4. 12 7
5. 10 8

Q15.3 5 35 10 12 35 17

1. 22 35
2. 35 19
3. 19 35
4. 19 24
5. 22 24

Directions for Q16-Q20:Find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters.

Q16.Look at this series: F2, __, D8, C16, B32, … What number should fill the blank?

1. A16
2. G4
3. E4
4. E3

Q17.Look at this series: 664, 332, 340, 170, ____, 89, … What number should fill the blank?

1. 85
2. 97
3. 109
4. 178

Q18.Look at this series: V, VIII, XI, XIV, __, XX, … What number should fill the blank?

1. IX
2. XXIII
3. XV
4. XVII

Q19.Look at this series: 70, 71, 76, __, 81, 86, 70, 91, … What number should fill the blank?

1. 70
2. 71
3. 80
4. 96

Q20.Look at this series: 8, 43, 11, 41, __, 39, 17, … What number should fill in the blank?

1. 8
2. 14
3. 43

Directions for Q21-24: Each of the following questions consists of four/ five figures as the problem figure followed by four/five figures marked (a), (b), (c), (d), and (e) as the answer figures. Select the correct answer figure which will continue the series as established by the problem figures.

Q21:

1. (a) 
2. (b) 
3. (c) 
4. None Of These

Q22:

1. (a)
2. (b)
3. (C) 
4. None Of These

Q23:

1. (a) 
2. (b)
3. (c)
4. None Of These

Q24:

1. (a)
2. (b)
3. (c) 
4. None Of These

Directions for Q25-Q29: In each item, there are two sets of figures; the first four figures are named problem figures, and next four figures are named answer figures indicated as (a), (b), (c), and (d). The problem figures follow a particular sequence. By the same, one of the four answer figures should appear as the fifth figure.

Q25:

1. (a)
2. (b)
3. (c )
4. (d)
5. None Of These

Q26:

1. (a)
2. (b)
3. (c)
4. (d)
5. None Of These

Q27: Which of the following figures shown below, when folded along the dotted lines, will form a pyramid-shaped box with a rectangular base?

1. (a)
2. (b) 
3. (c) 
4. (d) 
5. None Of These

Q28: Which of the answers figures include the separate components found in the question figure?

1. (a)
2. (b)
3. (c)
4. (d)
5. None Of These

Q29: Among the four answer figures, which one can be formed from the cut-out pieces given below in the question figure? 

1. (a)
2. (b) 
3. (c) 
4. (d)
5. None Of These

Directions for Q30: In each of the following questions, select the alternative in which the specified components of the problem figure are found.

Q30:

1. (a)
2. (b)
3. (c )
4. (d) 
5. None Of These

Answer keys for Series Non Verbal Reasoning Questions Q1-Q30

1. (B)	2. (B)	3. (B)	4. (C)	5. (B)
6. (B)	7. (B)	8. (D)	9. (B)	10. (B)
11. (C)	12.(E)	13. (B)	14.(E)	15. (C)
16.(C)	17. (D)	18.(D)	19. (B)	20.(B)
21. (B)	22.(C)\	23.(A)	24.(C)	25.(C)
26. (D)	27. (D)	28. (D)	29. (B)	30. (B)

Tips and Tricks to Solve Number Series Questions

The Easiest way to approach number series questions is to observe the difference between the various terms. Here are some methods and tips you can use to solve number series questions:

• If you notice a constant difference between the different numbers, it shows that the question belongs to the series with a constant degree category. 
• If you observe the difference between the various numbers it is either increasing or decreasing, then the question belongs to either the series with an increasing difference or the series with decreasing difference respectively. 
• In case, you are not able to spot an increasing or decreasing difference between the numbers, try to divide the 2nd term of the series with the first, the 2nd term with the 3rd term, and so on. If the answer to the constant division comes as the same number, then this question belongs to the product series. 
• In case, none of the above approaches works, you can write every term of the question as to the multiplication of 2 factors and try to spot a pattern between the terms. 
• If you are not able to spot a pattern and the difference between the terms is decreasing or increasing at an accelerated rate, you can try for the square/cube series. 

FAQs

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