The GCF is: 20
100 and 180's highest common factor is 20.
The GCF is 4.
The GCF is 45.
The GCF is 9.
The GCF is 4.
The GCF is 60.
The GCF is 180.
The GCF is 20.
The GCF is 12.
The GCF is 45.
The GCF is 20.
The greatest common factor of the numbers 180 and 150 is 30.