# What is the GCF of 3 and 7?

The greatest common factor(GCF) of two numbers 3 and 7 is the largest possible number which divides both the numbers exactly.

## Answer: GCF of 3 and 7 is 1

Let us see how to find the GCF of 3 and 7.

## Explanation

The greatest common factor of two numbers is the largest possible number which divides both the numbers exactly without any remainder.

## GCF of 3 and 7 by Listing the Common Factors

We follow a 2-step process:

- list all the factors of 3 and 7,
- identify the common factors.

The highest among the common factors is the GCF of 3 and 7.

Here both are prime numbers, so they do not have any common factor except 1.

Therefore, the greatest common factor(GCF) of 3 and 7 is 1