The GCF of 45 54 and 63 is: 9
First, the GCF can be no greater than the difference between the numbers, which is 9. If you try 9 as a factor of each number in the set, you see that it divides evenly into each, and so it is the GCF.
For another approach, you can write down the prime factorization of each number in the set:
45 = 3*3*5
54 = 2*3*3*3
63 = 3*3*7
The common factors in the prime factorizations are 3*3 = 9, so that's the GCF.
9 is the greatest common factor of 18, 45 and 54.
The Greatest Common Factor (GCF) is: 9
The greatest common factor of 54 and 80 is 2
The GCF of 45 and 54 is 9. The GCF can't be greater than the difference between the numbers, which is 9 in this case. Since 9 is a factor of both 45 and 54, it is the GCF.
The greatest common factor of 54 and 90 is 18.
The Greatest Common Factor of 36, 45, 54: 9
9 is the greatest common factor of 18, 45 and 54.
The greatest common factor of 54, 5, 36, and 45 is 1.
The Greatest Common Factor (GCF) is: 9
9
It is 9
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 3.