how to do prime and composite

To determine whether a number is prime or composite, you can follow these steps:

1. Start by identifying the number you want to check.
2. If the number is 1, it is neither prime nor composite.
3. If the number is 2, it is a prime number.
4. If the number is divisible by 2 (other than 2 itself), it is composite.
5. Check for divisibility by all numbers between 2 and the square root of the number in question. If the number is divisible by any of these numbers, it is composite.
6. If the number is not divisible by any number other than 1 and itself, it is a prime number.

For example, let's determine whether the number 7 is prime or composite:

- 7 is not divisible by 2.
- 7 is not divisible by 3.
- 7 is not divisible by 4.
- 7 is not divisible by 5.
- 7 is not divisible by 6.
- Since 7 is not divisible by any number other than 1 and 7, it is a prime number.

On the other hand, let's determine whether the number 9 is prime or composite:

- 9 is divisible by 3.
- Since 9 is divisible by 3, it is a composite number.

By following these steps, you can easily determine whether a given number is prime or composite.