90

24

90

24

72

24

18

24

18

24

3

18

24

3

18÷2

24÷2

3

9

12

3

9÷3

12÷3

3

3

4

or

90

24

72

24

18

24

18

24

3

18

24

3

18

24

3

2 × 3 × 3

2 × 2 × 2 × 3

3

3

3

4

or

Common Divisors for 18 and 24 are: 2 and 3

Greatest Common Divisor = 2 × 3 = 6

3

90÷6

24÷6

3

3

4