We know that

Prime number has 2 factors

And Composite number has more than 2 factors

For 1

Factors of 1

1 × 1 = 1

1 has only one factor

So, it is
**
neither prime nor composite
**

**
**

Last updated at Dec. 4, 2018 by Teachoo

We know that

Prime number has 2 factors

And Composite number has more than 2 factors

For 1

Factors of 1

1 × 1 = 1

1 has only one factor

So, it is
**
neither prime nor composite
**

**
**

Chapter 3 Class 6 Playing with Numbers

Concept wise

- Factors and Multiples
- Perfect number
- Prime and Composite Numbers
- Sum of prime numbers
- Prime numbers from 1 to 100
- Divisibility Tests - Divisibility by 5, 10, 2
- Divisibility Tests - Divisibility by 4, 8
- Divisibility Tests - Divisibility by 3, 6, 9
- Divisibility Tests - Divisibility by 11
- Divisibility Tests - All
- Common Multiples
- Common Factors
- More Divisibility Rules
- Factor Tree
- Prime Factorisation
- Highest Common Factor
- Lowest Common Multiple
- Statement questions on LCM
- Statement questions on HCF

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.