# What is the GCF of 3 and 18?

The Greatest Common Factor of 3 and 18 is the largest possible number which divides both 3 and 18 exactly.

## Answer: GCF of 3 and 18 is 3

Look at the explanation shown below to find the GCF of 3 and 18

## Explanation:

We will use two methods to find the greatest common factor of 3 and 18

- GCF of 3 and 18 by Listing the Common Factors
- GCF of 3 and 18 by Long Division

### Method 1: GCF of 3 and 18 by Listing the Common Factors

Factors of 3: 1, 3

Factors of 18: 1, 2, 3, 6, 9, 18

Common Factors of 3 and 18: 1, 3

Since the greatest common factor of 3 and 18 is 3, GCF of 3 and 18 is 3

### Method 2: GCF of 3 and 18 by Long Division

Follow the steps shown below to find the GCF of 3 and 18 using the long division method:

- Divide 18 by 3 and check the remainder.
- Since 3 divides 18 exactly and gives the remainder as 0, it is the GCF

You can find the GCF of 3 and 18 in any of the above methods but the solution will be the same.