Number Series Questions For IBM
IBM Number Series And Logical Ability
Here you will get IBM Number Series and Logical Ability Questions and Answers. The difficulty Level of the IBM Number series and logical ability test paper is Medium.You will get all the IBM Number Series and Logical ability PDF,previous year similar pattern questions of number series.
IBM Written Test | No of Questions |
---|---|
Number Series and Logical Ability Questions | 18 Ques |
Topics
3
Time Duration
38 mins
Adaptive
N
Negative Marking
N
IBM Number Series


Click here for IBM Number series Syllabus
IBM Number Series Questions with Solutions pdf
Tips for this section –
- Number of Questions:18 Questions
- Difficulty Level: Moderate
- Importance: High
- Suggested time to solve one question: 2 min 15 sec
IBM Number Series Question and Answer 2020
IBM Number Series Question | No. of questions in test | Total Time |
---|---|---|
3 Topics | 18 ques | 38 mins |
IBM PAID MATERIAL LATEST 2020 (UPDATED with Latest Pattern)
IBM PAID MATERIAL LATEST 2020 (UPDATED with Latest Pattern)
No Online Class in this, in Online class you will get paid materials access also, but if you just want materials then you can buy the ones below –
Old Pattern (NOT Asked in Cognify Exam)
New Pattern (Asked in Cognify Test)
Click here to join Online Class
Online Classes
- Free Paid Materials also given
- Click here to join Online Live Class(Buy)
Preparation Section


Ibm number series questions with solutions pdf
Q1.496, 492, 483, 467, ?
- 431
- 462
- 437
- 442
Solution:-442
496 – 492 = 4 = 22
492 – 483 = 9 = 32
483 – 467 = 16 = 42
So, the next has to be a difference of 25 = 52
467 – 25 = 442
Therefore, the next number in the given series is 442.
Q2.Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
- 20
- 25
- 30
- 50
Solution:-A
here 1,3,5............... terms are  decreasing by 10
and 2,4,6,8................ are being increased by 5
so 6th term = 15 5=20;
Q3.Find the number that can be put in place of the question mark.
3 7 14 23 36 49 ? 83 104
- 66
- 56
- 110
- 62
Solution:-B
7-3=4 4*4=16 16-2=14
36-23=13 13*4=52 52-3=49
83-56=27 27*4=108 108-4=104
Q4.Find the wrong number in the given series.3, 4, 10, 32, 136, 685, 4116
- 10
- 32
- 136
- 4116
Solution:-The sequence is as follows :
2nd term = (1st term 1) * 1
3rd term = (2nd term 1) * 2
4th term = (3rd term 1) * 3 and so on.
So, 32 is wrong and must be replaced by (10 1) * 3Â i.e. 33.
Q5. 1.5, 2.3, 3.1, ?, 4.7
- 3.2
- 3.4
- 3.7
- 3.9
Solution:-D. 3.9
However, In this simple addition series, each number increases by 0.8.
Q6.Find the number that can be put in place of the question mark.?
8,5,9,7,2,25,5,1,16,8,6,?
- 2
- 4
- 5
- 1
Solution:-B
8-5=3 ->3^2=9
7-2=5 ->5^2=25
5-1=4 ->4^2=16
8-6=2 ->2^2=4
Q7. Find the wrong number in the given sequence
31, 2, 41, 3, 52, 4, 61, 5, 71, 6
- 41
- 61
- 52
- 31
Solution:- C
In this sequence, there is a combination of two given series:
I. 31, 41, 52, 61, 71 and II. 2, 3, 4, 5, 6
Here, the pattern in I is + 10
Therefore, 52 is wrong and should be replaced by the previous number 41+10 = 51.
Q8. 15 , 22, 72, 552 , ?
- 8800
- 4763
- 4500
- 4592
Solution:- A.8800
15×2 – 8 = 22
22×4 – 16 = 72
72×8 – 24 = 552
552×16 – 32 = 8800
Q9. 69, 77.28, 86.55, 96.936, ?
- 102.546
- 108.568
- 105.675
- 119.876
Solution:-B
69 + (12*69/100) = 69 + 8.28 = 77.28
77.28 + (12*77.28/100) = 77.28 + 9.27 = 86.55
86.55 + (12*86.55/100) = 86.55 +10.386 = 96.936
96.936 + 11.632 = 108.568
Q10. 10 16.5 43.75 156.625 ?
- 709.3125
- 809.3125
- 699.3125
- 609.3125
- None of these
Solution-A
10*1.5 + 1.5 = 16.5
16.5*2.5 + 2.5 = 43.75
43.75*3.5 + 3.5 = 156.625
156.625*4.5 + 4.5 = 709.3125
Q11.Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?
- 1/3
- 1/8
- 2/8
- 1/16
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.
Q12.Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
- 12
- 14
- 27
- 53
Solution:-B
In this series, each number is repeated, then 13 is subtracted to arrive at the next number.
Q13. 3, 12, 8, 19, 13, 32, 18, 42, 23, 52
- 12
- 19
- 42
- 32
- None of the above
Solution:-B
The sequence is a combination of following two series:
I. 3, 8, 13, 18, 23 and II. 12, 19, 32, 42, 52
The pattern in I has a constant difference of +5, and the pattern in II has a constant difference of +10. So, in II, 19 is wrong and should be replaced by (12+10) i.e. 22
Q14. 1, 125, 729, 2177
- 2177
- 729
- 125
- 1
- 121
Solution:-A
1, 125, 729, 2177
1 = 13 , 125 = 53, 729 = 93. So, next number would be 133= 2197
Therefore, 2177 is wrong.
Q15. 21, 35, 56, 91, 154, ?
- 273
- 289
- 231
- 240
- 245
Solution:- A
21 × 2 – 7 = 35
35 × 2 – 14 = 56
56 × 2 – 21 = 91
91 × 2 – 28 = 154
154 × 2 – 35 = 273
Q16. 5, 7, 25, 131, ?, 8335
- 865
- 914
- 1025
- 802
- 925
Solution:- E
5 × 1 + 2 = 7
7 × 3 + 4 = 25
25 × 5 + 6 = 131
131 × 7 + 8 = 925
925 × 9 + 10 = 8335
Q17. 5, 8, 28, 162, ?, 12870
- 1738
- 2318
- 2224
- 2950
- 1288
Solution:- C
×2 – 2, ×4 – 4, ×6 – 6, ×8 – 8, ×10 – 10.
Q18. 11, 6, 5, 9, 16, ?
- 66.5
- 78.5
- 89.5
- 42.5
- 31.5
Solution:- D
11 ×0.5 + 0.5 = 6
6 ×1 – 1 = 5
5 ×1.5 + 1.5 = 9
9 ×1 – 1 = 16
16 ×2.5 + 2.5 = 42.5
Q19. 17.5 31 58 98.5 152.5
Solution:- C
Q20. 2 13 27 113 561 3369 23581
- 3
- 39
- 11
- 20
- 6
Solution:- C
Analytics below shows your performance in various Mocks on PrepInsta
Your analytics for this Subject
Mocks
0/63
IBM Mocks Completed
Mocks
0/3
IBM - Number Series Mocks Completed
Student Experience for IBM




- Name: Raman Raghav
- College: Vellore Institute of Technology, Chennai
- Branch: Computer Science
- Type of interview: Off-Campus Interview
Student Interview
I applied for the IBM off campus drive with a referral code. One of my relatives is placed in IBM Kolkata as the Software Engineer. I sent him my details and documents, and he provided me the IBM referral code through which I applied for the interview. I opted for the post of System Engineer at Global Business Services (GBS). I received an invitation email from IBM to attend the placement drive.
Written Round
There were three sections in the written paper,
- Quantitative Ability
- Number Series
- Business Communication Test
There were 18 questions on the Quantitative Ability and 18 questions on the Number series. There was a time limit of 2 min 15 seconds for every question and if the time limit exceeds the question will be auto-submitted. The difficulty level of the questions was moderate to high. The PrepInsta practice papers were a great help while preparing for these sections. In the Business Communication Test, there were 22 MCQ questions and the total time limit was 20 minutes. The difficulty level of all the questions was moderate. There were no reading comprehension passages. Instead, there were questions related to active /passive voice, synonyms, antonyms, and fill in the blanks. There were some questions related to effective email writing.
After clearing the Written Round, I was selected for the face to face interview.
Face to Face Interview
I reached the Bangalore campus for the interview rounds. There I was informed that there would be two face to face interview rounds:
- Technical Round
- HR Round
Technical Round
I was very nervous before the interview, as only the candidates who cleared this round would be shortlisted for the HR round. My cousin told me to prepare well for this round and be thorough with the resume. As I entered the cabin, the interviewer was seated there. He asked me for my resume. I handed over my resume to him, and he started asking questions related to C, C++, and database.
- What are linear and non-linear data structures?
- What is an inner join and an outer join?
- Write the logic of merge sort.
- What is an LRU cache?
- Is this tree BST or not?
- Explain your final year project
- Can you draw an ER diagram of the project?
- Is there any difference between having and where clause?
- Explain the ACID properties.
- Write the query to print duplicate rows in a table.
The interview continued for an hour. I was hoping for a positive result. The results for the Technical round were declared, and I cleared this round and moved further for the final round.
HR Round
After the technical round, I was quite confident for this round. I entered the cabin and greeted the HR. He asked me general questions related to my interests, career plans, etc.
- Introduce yourself?
- You had a gap of eight months after your graduation, what were you doing?
- Why do you want to join IBM?
- Any plans of doing M.B.A. or Mtech?
- Rate yourself on a scale of 1 – 10 in teamwork.
- Where do you see yourself in next two years?
The interview continued for 15 minutes. I was asked to submit the Xerox copies of my documents for further verifications. After a week I received an email from IBM that I have been selected for the profile of System Engineer. That was the happiest day of my life.
IBM Number Series Topics Analytics 2020
Number Series
No Of Questions:5-6 Questions
Time -2-3 Minutes
Diffculty Level -Moderate
Importance -High
Number Series II
No Of Questions:5-6 Questions
Time -2-3 Minutes
Diffculty Level -Moderate
Importance -High
Number System III
No Of Questions:5-6 Questions
Time -2-3 Minutes
Diffculty Level -Moderate
Importance -High
IBM Number Series
- Total Number of Question: 18 ques
- Total Time: 38 min
- Difficulty: Moderate
- Importance: High
Number Series
Cut off
Difficulty
Importance
IBM Number Series Question and Answer 2020
IBM Number Series Question | No. of questions in test | Total Time |
---|---|---|
3 Topics | 18 ques | 38 mins |
IBM Number Series Papers with Answers Based FAQ’s
Do not to spent much time on trickier questions, try to solve a number of easier questions first. IBM Test Pattern of Number Series is designed to be highly logical and tricky.
No, there isn't any sectional cutoff. But that doesn't mean that the competition becomes easy. You need to prepare well.
Reviews




Manu Pandey
IBM
I am confused about where to start. Just one word Awesome for the work they do. They help students in every possible way.




Mohit
IBM
I have always struggled with the logical section but after buying their paid material it became very easy for me to clear this exam.
Login/Signup to comment