15 , 45 , 60

Find the common factors for the numerical part:

15,45,60

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 45 are all numbers between 1 and 45, which divide 45 evenly.

Check numbers between 1 and 45

Find the factor pairs of 45 where x⋅y=45.

xy14531559

List the factors for 45.

1,3,5,9,15,45

1,3,5,9,15,45

The factors for 60 are all numbers between 1 and 60, which divide 60 evenly.

Check numbers between 1 and 60

Find the factor pairs of 60 where x⋅y=60.

xy160230320415512610

List the factors for 60.

1,2,3,4,5,6,10,12,15,20,30,60

1,2,3,4,5,6,10,12,15,20,30,60

List all the factors for 15,45,60 to find the common factors.

15: 1,3,5,15

45: 1,3,5,9,15,45

60: 1,2,3,4,5,6,10,12,15,20,30,60

The common factors for 15,45,60 are 1,3,5,15.

1,3,5,15

The GCF (HCF) of the numerical factors 1,3,5,15 is 15.

15

Find the GCF 15 , 45 , 60