Unit 1

Prime and Composite

Factor - a number you multiply with another to get a product. 6 is a factor of 18 because you multiply 3 x 6 to get 18.

Factor Pair - Two numbers that multiply to make a product. Example: 3 and 6 are a factor pair for 18 because 3 x 6 = 18.

Prime Number - a number where you can only make 1 rectangle because it only has 2 factors: 1 and itself.

Composite Number - A number where you can make more then one rectangle because it has more than 1 factor pair.