80
(240/80 = 3 and 320/80 = 4)
The GCF is 40.
The GCF is 24.
The GCF is 48.
GCF(320, 24, 32) = 8.
It's difficult to tell which way that one's going. 240 to 320 is a 33 and 1/3% increase. 320 to 240 is a 25% decrease.
The GCF is 80.
The GCF is 80.
The GCF is 40.
The GCF is 40.
The GCF is 240.
The GCF is 24.
The GCF is 10.
The GCF is 48.
The GCF is 40.
It is: (240+320)/2 = 280
GCF(320, 24, 32) = 8.
Since 20 is a factor of 320, it is automatically the GCF.