What are the gcf of 15 and 100?

Answer 1

The "g" in gcf stands for "greatest". The word greatest is a superlative adjective and that means that there can only be one GCF. So it makes no sense to ask what "are" the GCF.

GCF(15, 100) = 5.

Answer 2

The greatest common factor of 15 and 100 is 5.

5 x 3 = 15
5 x 20 = 100

Answer 3

GCF(15, 100) = 515 = 5 x 3

100 = 5 x 20

Answer 4

The GCF is 5

Answer 5

The GCF is 5.