The GCF is 3.
The GCF of 27 and 81 is 27. And their LCM is 81.
The GCF is 18.
27
There are an infinite amount of answers to that, like: 21 - 3 = 18 1004 - 986 = 18 47 - 29 = 18
The GCF is 9.
The GCF of 18 and 27 is 9.
The GCF of 21 and 42 is 21. The GCF of 17 and 27 is 1.
The GCF is 3.
The GCF of 21, 24, and 27 is 3.The Greatest Common Factor (GCF) is: 3
The GCF is 3.
The GCF is 3.
The GCF is 3.
The GCF is 9.
The GCF of 18, 27, and 78 is 3.18=2*3*327=3*3*378=2*3*13GCF=3
The GCF is 3.
The GCF is 1.
The GCF is 1.