What happens if there is no greatest common factor of 35 and 48?

Answer 1

There is a common factor of 35 and 48:

1 x 35 = 35

1 x 48 = 48

1 is a common factor: it is the only common factor and so is also the greatest common factor.

Since 1 is the only common factor, 35 and 48 are said to be relatively prime, or coprime.