The GCF is 1.
GCF of 5 and 3 is 1.
The GCF is 1.
75 = 3 * 5 * 5 and 285 = 3 * 5 * 19 they have in common ( 3 * 5) So the GCF is 15.
3 = 1 x 3 5 = 1 x 5 7 = 1 x 7 GCF = 1
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
GCF (125, 80, 225) = 5
The systematic way to get the answer is: 90 = 2*3*3*5 210 = 2*3*5*7 So gcf is 2*3*5 = 30
The GCF is 1.
You need at least two numbers to find a GCF. If that's 3 and 15, the GCF is 3.