It is 30 because it's the highest common factor of 60 and 90
30
15
The GCF is 6.
The HCF would be 6
The HCF of 4 and 90 is 2.
To solve this, set up the problem as a fraction: 60/90. Then reduce. The GCF of 60 and 90 is 30. Divide 30 into both 60 and 90 and you get a ratio of 2 to 3.
There are infinitely many pairs. One possible pair is 30 and 60.
The HCF of 12 and 60 is 12
The GCF is 18.
The GCF is 30.
The GCF is 10.
The GCF is 20.