No.
GCF(68, 72) = 4.
6 is not a prime number but it is a factor of 72
The GCF of 28, 68, 72 is 4.
3 is a prime factor of 72 and is contained in the prime factorization.
The greatest common factor (GCF) of 68 and 72 is 4.
9 is not prime, so it is not a prime factor of 72, great or otherwise.
2
33 is not a factor of 72.
The GCF is 4.
Three.
No.
The greatest common factor of 25 and 72 is 1, so they are relatively prime.