## Greatest Common Factor

## Work Time

# Greatest Common Factor

Common factors are factors that are shared by two numbers. The greatest common factor of two numbers is the greatest number that is a factor of the two numbers.

- Find the greatest common factor of 8 and 12.
- Find the greatest common factor of 18 and 24.
- Find the largest square tile that will cover a 27 × 63 rectangle.
- What is the greatest common factor of 54 and 126?

## Hint:

- Find numbers that will divide evenly into both numbers. Which is the largest?
- Find all the factors of both numbers. Look for the common factors.