## All About Factors

## Formative Assessment

# All About Factors

**Read and Discuss**

- A factor of a number is a whole number that divides a given quantity without a remainder. For example, 5 is a factor of 10 but not a factor of 8.
- Common factors are factors that are shared by two numbers. For example, 2 is a common factor of 4 and 8.
- The greatest common factor of two numbers is the greatest number that is a factor of the two numbers. So, the greatest common factor of 4 and 8 is 4.
- When you can exactly fit congruent squares along the edge of a rectangular grid, the side length of the square is a factor of the side length of the rectangular grid.

## Hint:

Can you:

- Describe the relationship between the side length of the square and the side lengths of the rectangular grid?
- Identify what the largest square that exactly covers the rectangular grid represents?
- Use the terms
*factor*,*common factor*, and*greatest common factor*appropriately?