84

68

84

68

68

68

16

68

16

68

1

16

68

1

16÷2

68÷2

1

8

34

1

8÷2

34÷2

1

4

17

or

84

68

68

68

16

68

16

68

1

16

68

1

16

68

1

2 × 2 × 2 × 2

2 × 2 × 17

1

1

4

17

or

Common Divisors for 16 and 68 are: 2 and 2

Greatest Common Divisor = 2 × 2 = 4

1

84÷4

68÷4

1

4

17