You need at least two numbers to find a GCF.
The GCF is 27.
The GCF is 63.
The GCF is 9.
The GCF is 27.
The GCF is 27.
GCF(105, 145, 189) = 1: the three are coprime.
225=3^2x5^2 189=3x7x9 Therefore GCF(225, 189) = 3
The greatest common factor of 189 and 195 is 3.
1+1=1 is the GCF of 189 and 200
The GCF is 1.
GCF(147, 189) = 21.