36

20

36

20

20

20

16

20

16

20

1

16

20

1

16÷2

20÷2

1

8

10

1

8÷2

10÷2

1

4

5

or

36

20

20

20

16

20

16

20

1

16

20

1

16

20

1

2 × 2 × 2 × 2

2 × 2 × 5

1

1

4

5

or

Common Divisors for 16 and 20 are: 2 and 2

Greatest Common Divisor = 2 × 2 = 4

1

36÷4

20÷4

1

4

5