56

36

56

36

36

36

20

36

20

36

1

20

36

1

20÷2

36÷2

1

10

18

1

10÷2

18÷2

1

5

9

or

56

36

36

36

20

36

20

36

1

20

36

1

20

36

1

2 × 2 × 5

2 × 2 × 3 × 3

1

1

5

9

or

Common Divisors for 20 and 36 are: 2 and 2

Greatest Common Divisor = 2 × 2 = 4

1

56÷4

36÷4

1

5

9