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NCERT Solutions for Class 6 Maths Chapter 3 Number Play Ex 3.6

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Class 6 Maths NCERT Solutions for Chapter 3 Exercise 3.6 Maths FREE PDF Download

Chapter 3 Number Play of Class 6 Maths introduces students to the fascinating world of numbers through various concepts like prime numbers, divisibility, factors, multiples, and magic numbers. Exercise 3.6 focuses on the Magic Number of Kaprekar, a unique mathematical discovery by the Indian mathematician D. R. Kaprekar. This exercise helps students explore how specific numbers can behave in interesting ways and strengthens their understanding of number operations and patterns.

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Table of Content
1. Class 6 Maths NCERT Solutions for Chapter 3 Exercise 3.6 Maths FREE PDF Download
2. Glance on Class 6 Chapter 3 Exercise 3.6 The Magic Number of Kaprekar
3. Access NCERT Solutions for Class 6 Maths Chapter 3 Number Play
    3.1Exercise 3.6
    3.2(Practise Questions)
4. Benefits of NCERT Solutions for Class 6 Maths Chapter 3 Exercise 3.6 
5. Class 6 Maths Chapter 3: Exercises Breakdown
6. Important Study Material Links for Maths Chapter 3 Class 6
7. Conclusion
8. Chapter-wise NCERT Solutions Class 6 Maths
9. Related Important Links for Class 6  Maths 
FAQs


Our Class 6 Maths NCERT Solutions PDF breaks the lesson into easy-to-understand explanations, making learning fun and interactive. Students will develop essential language skills with engaging activities and exercises. Check out the revised CBSE Class 6 Maths Syllabus and start practising the Maths Class 6 Chapter 3.


Glance on Class 6 Chapter 3 Exercise 3.6 The Magic Number of Kaprekar

  • Introduction to Kaprekar's Magic Number (6174).

  • Understanding how subtracting a number from its reverse leads to the magic number.

  • Exploration of digit manipulation and their properties.

  • Mental calculations and number puzzles.

  • Prime numbers, composite numbers, and their uses in number play.

Access NCERT Solutions for Class 6 Maths Chapter 3 Number Play

Exercise 3.6

Question: What number will repeat if you carry out the same steps with 3-digit numbers?

Answer: When you perform the steps with 4-digit numbers, you always reach the magic number 6174, the Kaprekar constant. For 3-digit numbers, the number that will start repeating is 495. This is known as the Kaprekar routine for 3-digit numbers.


(Practise Questions)

Question 1: Take any four-digit number where all the digits are not the same (for example, 3524). Perform the Kaprekar process and find out how many steps it takes to reach 6174.

Answer: 

Step 1: Arrange the digits in descending and ascending order: 5432 - 2345 = 3087

Step 2: Repeat the process: 8730 - 0378 = 8352

Step 3: Repeat the process: 8532 - 2358 = 6174

It took 3 steps to reach 6174.


Question 2: What will happen if you start with the number 1000 in the Kaprekar process? Show the steps.

Answer: 

Step 1: Arrange the digits in descending and ascending order: 1000 - 0001 = 0999

Step 2: Repeat the process: 9990 - 0999 = 8991

Step 3: Repeat the process: 9981 - 1899 = 8082

Step 4: Repeat the process: 8820 - 0288 = 8532

Step 5: Repeat the process: 8532 - 2358 = 6174

It took 5 steps to reach 6174.


Question 3: If you start with the number 7624, how many steps will it take to reach the Kaprekar constant 6174? 

Answer: 

Step 1: Arrange the digits in descending and ascending order: 7642 - 2467 = 5175

Step 2: Repeat the process: 7551 - 1557 = 5994

Step 3: Repeat the process: 9954 - 4599 = 5355

Step 4: Repeat the process: 5553 - 3555 = 1998

Step 5: Repeat the process: 9981 - 1899 = 8082

Step 6: Repeat the process: 8820 - 0288 = 8532

Step 7: Repeat the process: 8532 - 2358 = 6174

It took 7 steps to reach 6174.


Question 4: Start with the number 8754 and perform the Kaprekar process. How many iterations does it take to reach 6174?

Answer: 

Step 1: Arrange the digits in descending and ascending order: 8754 - 4578 = 4176

Step 2: Repeat the process: 7641 - 1467 = 6174

It took 2 steps to reach 6174.


Question 5: Why does the Kaprekar process not work if all four digits of the number are the same (e.g., 1111)?

Answer: If all digits of a number are the same, subtracting the number from its reverse results in zero. For example:

1111 - 1111 = 0000

This means the Kaprekar process cannot continue, and you will not reach 6174. Therefore, the process only works for numbers where not all digits are the same.


Benefits of NCERT Solutions for Class 6 Maths Chapter 3 Exercise 3.6 

  • A clear understanding of number patterns: Students learn to identify and apply number patterns.

  • Improves problem-solving skills: Helps in using divisibility rules effectively in various problems.

  • Engages students with number puzzles: Enhances logical thinking through fun and interactive puzzles.

  • Strengthens core Maths concepts: Builds a solid foundation in number theory and divisibility.

  • Helps in exam preparation: Provides easy-to-understand solutions, aiding in quick revision before exams.


Class 6 Maths Chapter 3: Exercises Breakdown

Exercise

Topic

Exercise 3.1

Numbers Can Tell Us Things

Exercise 3.2

Supercells

Exercise 3.3

Patterns of Numbers on the Number Line

Exercise 3.4

Playing with Digits

Exercise 3.5

Pretty Palindromic Patterns

Exercise 3.7

Clock and Calendar Numbers

Exercise 3.8

Mental Math

Exercise 3.9

Playing with Number Patterns

Exercise 3.10

An Unsolved Mystery — the Collatz Conjecture!

Exercise 3.11

Simple Estimation

Exercise 3.12

Games and Winning Strategies



Important Study Material Links for Maths Chapter 3 Class 6

S.No.

Important Study Material Links for Chapter 3

1.

Class 6 Number Play Important Questions

2.

Class 6 Number Play Notes

3.

Class 6 Maths Number Play Worksheets



Conclusion

Chapter 3: Number Play in the Class 6 Maths syllabus is an exciting chapter that introduces students to the world of numbers and their properties. Exercise 3.6 on The Magic Number of Kaprekar encourages students to explore unique mathematical phenomena while honing their problem-solving and reasoning skills. Mastering this chapter will make students more confident in their understanding of number patterns, operations, and magic numbers, which helps them understand numbers.


Chapter-wise NCERT Solutions Class 6 Maths

After familiarising yourself with the Class 6 Maths  Chapters Question Answers, you can access comprehensive NCERT Solutions from all Class 6 Maths textbook chapters.




Related Important Links for Class 6  Maths 

Along with this, students can also download additional study materials provided by Vedantu for Maths  Class 6-


FAQs on NCERT Solutions for Class 6 Maths Chapter 3 Number Play Ex 3.6

1. What is Kaprekar's Magic Number mentioned in Chapter 3: Number Play?

Kaprekar's Magic Number is 6174, which is reached by subtracting a number from its reverse repeatedly until the result is 6174.

2. How do you find the Magic Number of Kaprekar as explained in Exercise 3.6?

To find the magic number, rearrange the digits of a four-digit number in descending and ascending order, subtract the smaller from the larger, and repeat the process until you reach 6174.

3. What makes the number 6174 special in mathematics?

The number 6174 is special because, after a few iterations of subtracting the digits in a certain way, all four-digit numbers (excluding a few exceptions) will eventually reach 6174.

4. Why is Kaprekar's constant referred to as a 'magic number'?

It is called a magic number because, no matter what four-digit number (with at least two different digits) you start with, you will always reach 6174 after a few steps.

5. How many steps does it take to reach 6174 from any four-digit number?

It usually takes between 1 to 7 steps to reach 6174 from any four-digit number that follows the Kaprekar process.

6. Is 6174 the only magic number in mathematics?

No, there are other interesting numbers in mathematics with unique properties, but 6174 is particularly famous due to its simple yet fascinating iterative process.

7. What happens if all the digits of the number are the same, like 1111?

If all digits of a number are the same, Kaprekar's process results in zero, which is not applicable for reaching 6174.

8. What is the significance of digit manipulation in Kaprekar's process?

Digit manipulation helps explore patterns and properties of numbers, teaching students about mathematical operations and reasoning.

9. How does this exercise 3.6  help in improving problem-solving skills?

This exercise encourages students to think logically, perform iterative calculations, and recognize number patterns, all of which are essential for improving problem-solving skills.

10. Why is it important to learn about the Magic Number of Kaprekar in Class 6?

Learning about the magic number introduces students to mathematical patterns, logical reasoning, and unique properties of numbers, making maths more interesting and engaging.