It is: 20
The GCF is: 4
140 is the Greatest Common Factor of 280 and 980.
The GCF of 304 and 980 is 4.
The GCF of 252, 420, and 980 is 28.
The GCF is: 10
A couple of problems. You need at least two numbers to find a GCF and the GCF is by definition positive.
The GCF is 4.
The GCF is 140.
The GCF is 400.
The GCF is 8.
240
480/1200 = 2/5 The GCF of 480 and 1200 is 240. 84/108 = 7/9 The GCF of 84 and 108 is 12.