The GCF is 1.
Factors of 189: 1, 3, 7, 9, 21, 27, 63, 189 Factors of 2470: 1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470 GCF (189, 2470) = 1
Factor them. 3 x 3 x 3 x 7 = 189 2 x 5 x 13 x 19 = 2470 No common prime factors. The GCF is 1.
You need at least two numbers to find a GCF.
The GCF is 63.
The GCF is 9.
The GCF is 27.
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.
The GCF is 21.