Everything
Class 6

Class 6 Maths (Ganita Prakash)

Class 6 Science (Curiosity)

Class 6 Social Science

Class 6 English
Class 7

Class 7 Maths (Ganita Prakash - Part 1 and Part 2)

Class 7 Science (Curiosity)

Class 7 Social Science

Class 7 English
Class 8

Class 8 Maths (Ganita Prakash - Part 1 & Part 2)

Class 8 Science (Curiosity)

Class 8 Social Science

Class 8 English
Class 9

Class 9 Maths (Ganita Manjari - Part 1)

Class 9 Science (Exploration)

Class 9 Social Science

Class 9 English
Class 10

Class 10 Maths

Class 10 Science

Class 10 Social Science

Class 10 English
Class 11

Class 11 Maths

Class 11 Accountancy

Class 11 English

Class 11 Computer Science (Python)
Class 12

Class 12 Maths

Class 12 English

Class 12 Economics

Class 12 Accountancy

Class 12 Physics

Class 12 Chemistry

Class 12 Biology

Class 12 Computer Science (Python)

Class 12 Physical Education
Courses

GST and Accounting Course

Excel Course

Tally Course

Finance and CMA Data Course

Payroll Course
Interesting

Learn English

Learn Excel

Learn Tally

Learn GST (Goods and Services Tax)

Learn Accounting and Finance
Popular

GST Demo

GST Tax Invoice Format

Accounts Tax Practical

Tally Ledger List
Classes
- Class 6
- Class 7
- Class 8
- Class 9
- Class 10
- Class 11
- Class 12
Maths
Science
Finance

Class 12
Class 11
Class 10
Class 9
Class 8
Class 7
Class 6
Practice
GST
Accounts Tax
Englishtan
Excel

Class 6 Maths (Ganita Prakash)
Class 6 Maths (old NCERT)
Class 6 Science (Curiosity)
Class 6 Science (old NCERT)
Class 6 Social Science
Class 6 English

Class 7 Maths (Ganita Prakash)
Class 7 Maths (Ganita Prakash - Part 2)
Class 7 Maths (old NCERT)
Class 7 Science (Curiosity)
Class 7 Science (old NCERT)
Class 7 Social Science
Class 7 English

Class 8 Maths (Ganita Prakash)
Class 8 Maths (Ganita Prakash - Part 2)
Class 8 Maths (old NCERT)
Class 8 Science (Curiosity)
Class 8 Science (old NCERT)
Class 8 Social Science
Class 8 English

Class 9 Maths (Ganita Manjari - Part 1)
Class 9 Maths (old NCERT)
Class 9 Science (Exploration)
Class 9 Science (old NCERT)
Class 9 Social Science
Class 9 English

Class 10 Maths
Class 10 Science
Class 10 Social Science
Class 10 English

Class 11 Maths
Class 11 Accountancy
Class 11 Computer Science (Python)
Class 11 English

Class 12 Maths
Class 12 English
Class 12 Economics
Class 12 Accountancy
Class 12 Physics
Class 12 Chemistry
Class 12 Biology
Class 12 Computer Science (Python)
Class 12 Physical Education

GST and Accounting Course
Excel Course
Tally Course
Finance and CMA Data Course
Payroll Course

Learn English
Learn Excel
Learn Tally
Learn GST (Goods and Services Tax)
Learn Accounting and Finance

GST Demo
GST Tax Invoice Format
Accounts Tax Practical
Tally Ledger List

Mathematical Reasoning
Serial order wise
Examples

Examples

Example 1 (i)

Example 1 (ii) Important

Example 1 (iii)

Example 1 (iv) Important

Example 1 (v)

Example 1 (vi)

Example 2 (i) Important

Example 2 (ii)

Example 3 (i)

Example 3 (ii) Important

Example 3 (iii)

Example 3 (iv)

You are here

Example 4 (i)

Example 4 (ii)

Example 4 (iii) Important

Example 4 (iv) Important

Example 5 (i)

Example 5 (ii) Important

Example 5 (iii)

Example 5 (iv) Important

Example 5 (v)

Example 5 (vi) Important

Example 6 (i)

Example 6 (ii) Important

Example 6 (iii)

Example 7 (i)

Example 7 (ii) Important

Example 7 (iii)

Example 7 (iv) Important

Example 8 (i)

Example 8 (ii) Important

Example 8 (iii)

Example 9

Example 10 Important

Example 11 (i)

Example 11 (ii) Important

Example 12 (i)

Example 12 (ii)

Example 13 Important

Example 14 Important

Example 15 Important

Example 16

Example 17

Example 18 (i)

Example 18 (ii) Important

Example 18 (iii)

Example 18 (iv)

Example 19 Important

Example 20 Important

Miscellaneous →

Mathematical Reasoning

Serial order wise

Statements
Negation of Statements
Compound Statements
If then Statements
Proving Statements true or false
Examples
Miscellaneous

Example 3 (iv) - Mathematical Reasoning

Last updated at August 10, 2026 by Teachoo

Example 3 - Chapter 14 Class 11 Mathematical Reasoning - Part 4

Next: Example 4 (i) → Remove Ads

Teachoo · Class 11 Class 11, made simpler Clear concepts, step by step Practice important questions Keep learning with Teachoo Explore Class 11 →

Transcript

Example 3 Write the negation of the following statements and check whether the resulting statements are true, (iv) The sum of 3 and 4 is 9. Negation of given statement The sum of 3 and 4 is not 9. We know that the sum of 3 and 4 is 7. Hence resulting statement is true.

Mathematical Reasoning
Serial order wise

Examples

Example 1 (i)

Example 1 (ii) Important

Example 1 (iii)

Example 1 (iv) Important

Example 1 (v)

Example 1 (vi)

Example 2 (i) Important

Example 2 (ii)

Example 3 (i)

Example 3 (ii) Important

Example 3 (iii)

Example 3 (iv)

You are here

Example 4 (i)

Example 4 (ii)

Example 4 (iii) Important

Example 4 (iv) Important

Example 5 (i)

Example 5 (ii) Important

Example 5 (iii)

Example 5 (iv) Important

Example 5 (v)

Example 5 (vi) Important

Example 6 (i)

Example 6 (ii) Important

Example 6 (iii)

Example 7 (i)

Example 7 (ii) Important

Example 7 (iii)

Example 7 (iv) Important

Example 8 (i)

Example 8 (ii) Important

Example 8 (iii)

Example 9

Example 10 Important

Example 11 (i)

Example 11 (ii) Important

Example 12 (i)

Example 12 (ii)

Example 13 Important

Example 14 Important

Example 15 Important

Example 16

Example 17

Example 18 (i)

Example 18 (ii) Important

Example 18 (iii)

Example 18 (iv)

Example 19 Important

Example 20 Important

Miscellaneous →

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.

It looks like you're using AdBlock

Don't be a miser! Join Teachoo Black at ₹19 only to view the ad-free version of Teachoo.

Join Teachoo Black at ₹19 only

Please login to view more pages. It's free :)

Teachoo gives you a better experience when you're logged in. Please login :)

Teachoo is the best place to learn Maths, Science, GST and Finance (using AI)

Download Our Apps

Android App
iOS App

Classes

Class 6
Class 7
Class 8
Class 9
Class 10
Class 11
Class 12

Useful Resources

GST, Income Tax and Tally Course
Teachoo Ad free version
Worksheets and Quizzes
Skillistan
GST Simulation Portal

Sample Paper Solutions

Class 10 Maths
Class 10 Science
Class 10 English
Class 10 Social Science
Class 12 Maths
Class 12 English

Maths - Useful links

Class 6 Maths NCERT Solutions (Ganita Prakash)
Class 7 Maths NCERT Solutions (Ganita Prakash - Part 1 and 2)
Class 8 Maths NCERT Solutions (Ganita Prakash - Part 1 and 2)
Class 9 Maths NCERT Solutions (Ganita Manjari - Part 1)
Class 10 Maths NCERT Solutions
Class 11 Maths NCERT Solutions
Class 12 Maths NCERT Solutions

Science - Useful Links

Class 6 Science NCERT Solutions (Curiosity)
Class 7 Science NCERT Solutions (Curiosity)
Class 8 Science NCERT Solutions (Curiosity)
Class 9 Science NCERT Solutions (Exploration)
Class 10 Science NCERT Solutions

Interesting

Learn English
Learn Excel
Learn Tally
Learn GST (Goods and Services Tax)

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular

Example 3 (iv) - Mathematical Reasoning

Davneet Singh