It is: 15
The GCF of 30 & 135 is 15.
The GCF is 30.
GCF is 15
The GCF is 15.
The GCF is 15.
The GCF is 15.
The GCF is 5.
The GCF is 15.
The GCF is 1.
The GCF is 27.
The GCF is 27.
The gcf is 15; so 30 and 135 are not relatively prime. 30 = 2 x 3 x 5 135 = 33 x 5 hcf = 3 x 5 = 15 If the gcf of two numbers is 1, then they are relatively prime 15 ≠ 1, thus 30 and 135 are not relatively prime.