GREATEST COMMON FACTOR

Front

Factors of 12

Back

1, 2, 3, 4, 6, 12

Front

Factors of 4

Back

1, 2, 4

Front

Factors of 24

Back

1, 2, 3, 4, 6, 8, 12, 24

Front

Common factors of 6 and 8

Back

1, 2

Front

Common factor of 9 and 12

Back

1, 3

Front

Common factor of 16 and 20

Back

1, 2, 4

Front

Common factors of 7 and 21

Back

1, 7

Front

Greatest common factor of 10 and 20

Back

10

Front

Greatest common factors of 9 and 15

Back

3

Front

Greatest common factor of 6 and 8

Back

2