15 , 40

Find the common factors for the numerical part:

15,40

The factors for 15 are all numbers between 1 and 15, which divide 15 evenly.

Check numbers between 1 and 15

Find the factor pairs of 15 where x⋅y=15.

xy11535

List the factors for 15.

1,3,5,15

1,3,5,15

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

List all the factors for 15,40 to find the common factors.

15: 1,3,5,15

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

The common factors for 15,40 are 1,5.

1,5

The GCF (HCF) of the numerical factors 1,5 is 5.

5

Find the GCF 15 , 40