It is one
11 is a prime number, meaning its only factors are 1 and itself. So, the greatest common factor of 9 and 11 is 1.
The Greatest Common Factor of 45 and 72 is 9.3 x 3 = 9
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
9 is the greatest factor of 9.
27/3 = 9 and 51/3 = 17 so three is the greatest common factor (it's the only)
The greatest common factor of 63, 81, and 99 is 9.The prime factorization of 63 is 7*9.The prime factorization of 81 is 9*9.The prime factorization of 99 is 11*9.Thus, the greatest of the common factors of 9.
The Greatest Common Factor (GCF) is: 9
The Greatest Common Factor (GCF) is: 9