## IBM NUMBER SERIES AND LOGICAL ABILITY

Here you will get IBM Number Series and Logical Ability Questions and Answers.In IBM Number Series and Logical ability paper you will get 38 minutes to solve the questions.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 | Time |
---|---|---|

Number Series and Logical Ability Questions | 18 Ques | 38 mins |

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 PAID MATERIAL LATEST 2020 (UPDATED with Latest Pattern)

### IBM PAID MATERIAL LATEST 2020 (UPDATED with Latest Pattern)

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Old Pattern (**NOT** Asked in Cognify Exam)

New Pattern (Asked in Cognify Test)

### 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 Â 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 = 1^{3} , 125 = 5^{3}, 729 = 9^{3}. So, next number would be 13^{3}= 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**

### 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

#### Number Series

Cut off

Difficulty

Importance

### Number Series IBM

### IBM Number Series Papers with Answers Based FAQ’s

#### What is the difficulty level of IBM Number Series Section?

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.

#### Is there any sectional cutoff for Number Series Section?

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

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Mohit

IBM

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