The GCF between those two numbers is actually 1 because they are relatively prime.
Chat with our AI personalities
It is 6
GCF(27, 30, 36) = 3
The greatest common factor of 18, 30 and 36 is 6
HCF(30, 36, 42) = 6 LCM(30, 36, 42) = 1260
When you divide 2 or more numbers by a common factor which is not the greatest common factor, they will still have a common factor which is greater than 1. When you divide them by their greatest common factor, the quotients are coprime - that is, they no longer have a factor in common other than 1.