40 , 20 , 4

Find the common factors for the numerical part:

40,20,4

The factors for 40 are all numbers between 1 and 40, which divide 40 evenly.

Check numbers between 1 and 40

Find the factor pairs of 40 where x⋅y=40.

xy14022041058

List the factors for 40.

1,2,4,5,8,10,20,40

1,2,4,5,8,10,20,40

The factors for 20 are all numbers between 1 and 20, which divide 20 evenly.

Check numbers between 1 and 20

Find the factor pairs of 20 where x⋅y=20.

xy12021045

List the factors for 20.

1,2,4,5,10,20

1,2,4,5,10,20

The factors for 4 are all numbers between 1 and 4, which divide 4 evenly.

Check numbers between 1 and 4

Find the factor pairs of 4 where x⋅y=4.

xy1422

List the factors for 4.

1,2,4

1,2,4

List all the factors for 40,20,4 to find the common factors.

40: 1,2,4,5,8,10,20,40

20: 1,2,4,5,10,20

4: 1,2,4

The common factors for 40,20,4 are 1,2,4.

1,2,4

The GCF (HCF) of the numerical factors 1,2,4 is 4.

4

Find the GCF 40 , 20 , 4