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# Write down separately the prime and composite numbers less than 20

**Solution:**

We will be using the concepts of composite number and prime number to solve this.

Prime numbers are the numbers that have only two factors,1 and the number itself. Thus, the prime numbers less than 20 are as follows: 2, 3, 5, 7, 11, 13, 17 and 19

Composite numbers can be defined as natural numbers that have more than two factors. Thus, the composite numbers less than 20 are as follows: 4, 6, 8, 9, 10, 12, 14, 15, 16 and 18

NCERT Solutions for Class 6 Maths Chapter 3 Exercise 3.2 Question 4

## Write down separately the prime and composite numbers less than 20

**Summary:**

The prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17, and 19, and the composite numbers less than 20 are 4, 6, 8, 9, 10, 12, 14, 15, 16, and 18

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