Question

What is the greatest common factor of 7 and 10

Answer 1

The greatest common factor of 7 and 10 is 1 because no number, not the smallest number possible,2, can go into both, it can go into 10, but not 7.

Answer 2

The answer is 1.
7 x 1 = 7
and 10 x 1 = 10
They don't have other factors in common besides 1.