140=2*2*5*7
300=2*2*3*5*5
comon factrs are 2*2*5=20 20 is the gcf
GCF of 140 and 25 is 5.
The GCF is 28.
The GCF is 35.
The GCF is 20.
The GCF is 35.
The GCF is 20.
The GCF is 10.
The GCF is 4.
The GCF is 4.
The GCF is 1.
The GCF is 2.
The GCF is 20.