54

42

54

42

42

42

12

42

12

42

1

12

42

1

12÷2

42÷2

1

6

21

1

6÷3

21÷3

1

2

7

or

54

42

42

42

12

42

12

42

1

12

42

1

12

42

1

2 × 2 × 3

2 × 3 × 7

1

1

2

7

or

Common Divisors for 12 and 42 are: 2 and 3

Greatest Common Divisor = 2 × 3 = 6

1

54÷6

42÷6

1

2

7