NCERT Class 6 Math Exercise 3.4 Solution of Chapter 3 Playing with Numbers with explanation. Here we provide Class 6 Maths all Chapters in Hindi for cbse, HBSE, Mp Board, UP Board and some other boards.

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NCERT Class 6 Maths Chapter 3 Playing with Numbers Exercise 3.4 Solution in english Medium.

**Class 6 Maths Chapter 3 Exercise 3.4 Solution**

**Q. 1. Find the common factors of:**

**A. 20 and 28**

**Ans.** Common factors:-1, 2, 4

**B. 15 and 25**

**Ans.** Common factors:-1, 5

**C. 35 and 50**

**Ans.** Common factors:-1, 5

**D. 56 and 120**

**Ans.** Common factors:- 1, 2, 4, 8

**Q.2. Find the common factors of:**

**A. 4, 8 and 12**

**Ans.** Common factors:- 1, 2, 4

**B. 5, 15 and 25**

**Ans.** Common factors:- 1, 5

**Q.3. Find first three common multiples of:**

**A. 6 and 8**

**Ans.** LCM of 6 and 8 = 24

Therefore three common multiples of 6 and 8 will be 24, 48, 72.

**B. 12 and 18**

**Ans.** LCM of 12 and 18 = 36

Therefore three common multiples of 12 and

18 will be 36, 72, 108.

**Q.4. Write all the numbers less than 100 which are common multiples of 3 and 4.**

**Ans.** 1st Common multiples of 3 and 4= 12

Therefore it contains table of 12 upto 100

12, 24, 36, 48, 60, 72, 84, 96.

**Q.5. Which of the following numbers are co-prime?**

**A. 18 and 35**

**Ans.** It is a co-prime number.

**B. 15 and 18**

**Ans.** . It is a co-prime number.

**C. 30 and 415**

**Ans.** . It is not a co-prime number.

**D. 17 and 68**

**Ans.** . It is not a co-prime number.

**E. 216 and 215**

**Ans. .** It is a co-prime number.

**F. 81 and 16**

**Ans.** It is a co-prime number.

**Q.6. A number is divisible by both 5 and 12. By which other number will that number be always divisible?**

**Ans.** The number divisible by both 5 and 12 is 60 .

As, we know that a number is always divisible by itself .

Therefore, other number is 60.

**Q.7. A number is divisible by 12.By what other numbers will that number be divisible?**

**Ans.** A number is divisible by 12. Its means it is also divisible by all the factors of 12.

Therefore other numbers that divide the same number are 1, 2, 3, 4, 6.