One
Three.
What are the factor strings of 120
At least thirty-six of them.
Factor strings are multiplication sentences. 3 x 3 is a factor string for 9.
23 is prime. No strings.
41 is prime. No strings.
one
Besides 39 and 1, what is one factor of 39?
What IS the common factor of 39 13
Yes.
39 is.
Since 39 is a factor of 117, it is automatically the GCF.