It is 30 because it's the highest common factor of 60 and 90
30
The GCF is 6.
15
The GCF of 60 and 90 is 30.
The HCF would be 6
There are infinitely many pairs. One possible pair is 30 and 60.
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.
The HCF of 12 and 60 is 12
The GCF is 18.
The GCF is 30.
HCF(160, 90) = 10.