The GCF is 50.
The GCF is 100.
The GCF is 300.
The GCF is 75.
The GCF is 12.
The GCF is 20.
The GCF is 90.
The GCF of 15 and 90 is 15.
The GCF is 5.
If A is a factor of 90, the GCF is A. If A is a multiple of 90, the GCF is 90. If A is co-prime with 90, the GCF is 1.
The GCF of 300 and 5 is 5.
The GCF of 120 and 300 is 60.