What if most common factor of 42 and 15
The prime factorization of 15 is: 3 x 5The prime factorization of 42 is: 2 x 3 x 7The prime factors and multiplicities 15 and 42 have in common are: 33 is the gcf of 15 and 42gcf(15,42) = 3
I think it's 3.1, 2, 3, 6, 7, 14, 21, 421,3,5,153 is the common factor
