**ICSE Number Line Class 6 Chapter 5 Playing With Numbers Exercise 5C Solutions**

This post is created to help all the ICSE Class 6 students for the Solutions of Number Line Class 6 Mathematics Book, Chapter 5 Playing With Numbers Exercise 5C. Here students can easily find step by step solutions of all the problems for Playing With Numbers Exercise 5C. Here students all find exercise wise proper solutions for every problems. Here all the problem are solved with easy to understand methods so that all students can understand easily.

**Chapter 5 – Playing With Numbers**

**Playing With Numbers – Exercise 5C all Questions Solution**

**Question number – (1)**

**Solution :**

= (2, 4), (4, 6), (6, 8), (8, 10), (10, 12), (12, 14), (14, 16), (16, 20), (22, 24), (26, 28)

**Question number – (2)**

**Solution :**

Prime numbers are

= 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79

**Question number – (3)**

**Solution :**

= Co-prime number

= (8, 15), (7, 13), (11, 17), (6, 11)

**Question number – (4)**

**Solution :**

Twin prime number –

= (3, 5), (5, 7), (7, 11), (11, 13)

**Question number – (5)**

**Solution :**

Yes, composite number can be odd

smallest odd composite number is 9

**(6) Express the following as the sum of three prime numbers**

**Solution :**

(a) 37 + 5 + 3

(b) 7 + 3 + 2

(c) 7 + 5 + 3

(d) 13 + 5 + 3

**(7) Find all the factors of the following numbers.**

**Solution :**

(a) 1, 3, 5, 15, 25, 75

(b) 1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 96

(c) 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

(d) 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 100

**(8) Express the following as the sum of a product of prime numbers and 1.**

**Solution :**

(a) (2 × 2 × 2 × 2 × 5) + 1

(b) (2 × 2 × 2 × 5 × 13) + 1

(c) (2 × 3 × 3 × 5) + 1

**(9) List all the numbers less than 70 that are multiples of both 4 and 6.**

**Solution :**

Multiples of both 4 and 6 are –

= 12, 24, 36, 48, 60

**(10) Express the following numbers as the products of their prime factors.**

**Solution :**

(a) 2 × 13 × 7

(b) 2 × 5 × 5 × 17

(c) 2 × 2 × 3 × 5 × 7

(d) 5 × 2 × 2 73

(e) 2 × 2 × 7 × 7 × 13

(f) 5 × 2 × 2 × 2 × 37