21 , 14 , 2

Find the common factors for the numerical part:

21,14,2

The factors for 21 are all numbers between 1 and 21, which divide 21 evenly.

Check numbers between 1 and 21

Find the factor pairs of 21 where x⋅y=21.

xy12137

List the factors for 21.

1,3,7,21

1,3,7,21

The factors for 14 are all numbers between 1 and 14, which divide 14 evenly.

Check numbers between 1 and 14

Find the factor pairs of 14 where x⋅y=14.

xy11427

List the factors for 14.

1,2,7,14

1,2,7,14

The factors for 2 are all numbers between 1 and 2, which divide 2 evenly.

Check numbers between 1 and 2

Find the factor pairs of 2 where x⋅y=2.

xy12

List the factors for 2.

1,2

1,2

List all the factors for 21,14,2 to find the common factors.

21: 1,3,7,21

14: 1,2,7,14

2: 1,2

The common factors for 21,14,2 are 1.

1

The GCF (HCF) of the numerical factors 1 is 1.

1

Find the GCF 21 , 14 , 2