Prime and Composite Numbers, Factors, and Fractions

Front

Back

prime

Front

Back

composite

Front

Back

composite

Front

Back

composite

Front

Back

13

Front

Which number is a factor of all numbers?

Back

1

Front

Which lists all of the factors of 20?

Back

1, 2, 4, 5, 10, 20

Front

List all of the factors of 18.

Back

1, 2, 3, 6, 9, 18

Front

Which number is a factor of 21? Options: 2, 3, 4

Back

3

Front

Which number is a factor of 15? Options: 5, 4, 10

Back

5