16

12

16

12

12

12

4

12

4

12

1

4

12

1

4÷2

12÷2

1

2

6

1

2÷2

6÷2

1

1

3

or

16

12

12

12

4

12

4

12

1

4

12

1

4

12

1

2 × 2

2 × 2 × 3

1

1

1

3

or

Common Divisors for 4 and 12 are: 2 and 2

Greatest Common Divisor = 2 × 2 = 4

1

16÷4

12÷4

1

1

3