The highest common factor of 45 (forty-five) and 8 (eight) would equal to 1 (one). See:
45= 1 x 45 8= 1 x 8
3 x 15 2 x 4
5 x 9
Common Factor= 1
H.C.F. (Highest Common Factor)= 1
The GCF is 1.
The GCF is 5.
5
5
5
5
The GCF is 5.
It is 5
The GCF is 1.
The GCF is 1.
Just 1.
Since 5 is a factor of 15, it is automatically the GCF.