The GCF for the two numbers is 3
The factors of 9 are 3 and 3
The factors of 15 are 3 and 5
(9 does not share 5 with 15 as a factor and 3 only appears once as a factor for 15 so you can't use it a second time to increase the size of the GCF)
The GCF is 1.
The GCF of 9, 12, 15 is 3.
gcf(15, 9, 19) = 1.
The GCF is 3.
The GCF is 3.
The GCF is 3.
The GCF is 1.
The GCF of 4, 9, and 15 is 1.
The GCF is 1.
The GCF is 3.
The GCF is 1.
The highest common factor of 9 and 15 is 3.(3*3) and (5*3)Factors of 9: 1 3 9Factors of 15: 1 3 5 15The GCF is 3.The GCF is 3.