42 , 18 , 84

Find the common factors for the numerical part:

42,18,84

The factors for 42 are all numbers between 1 and 42, which divide 42 evenly.

Check numbers between 1 and 42

Find the factor pairs of 42 where x⋅y=42.

xy14222131467

List the factors for 42.

1,2,3,6,7,14,21,42

1,2,3,6,7,14,21,42

The factors for 18 are all numbers between 1 and 18, which divide 18 evenly.

Check numbers between 1 and 18

Find the factor pairs of 18 where x⋅y=18.

xy1182936

List the factors for 18.

1,2,3,6,9,18

1,2,3,6,9,18

The factors for 84 are all numbers between 1 and 84, which divide 84 evenly.

Check numbers between 1 and 84

Find the factor pairs of 84 where x⋅y=84.

xy184242328421614712

List the factors for 84.

1,2,3,4,6,7,12,14,21,28,42,84

1,2,3,4,6,7,12,14,21,28,42,84

List all the factors for 42,18,84 to find the common factors.

42: 1,2,3,6,7,14,21,42

18: 1,2,3,6,9,18

84: 1,2,3,4,6,7,12,14,21,28,42,84

The common factors for 42,18,84 are 1,2,3,6.

1,2,3,6

The GCF (HCF) of the numerical factors 1,2,3,6 is 6.

6

Find the GCF 42 , 18 , 84