The gcf is the greatest common factor. A way of finding the gcf of three numbers is to find the gcf of the first two and then finding the gcf of that number and the third number. Because of the unique prime factorization theorem, the greatest common factor will be a product of some of the prime factors in either number. The prime factorization of 40 is 2^3 * 5 and the prime factorization of 60 is 2^2 * 3 * 5, so the gcf is going to be what is in both, or, in this case, 2^2 * 5. Th prime factorization of 80 is 2^4 * 5 and so gcf of all three numbers is 2^2 * 5, or 20.
The GCF is 20.
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40.Factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80.Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.GCF (40, 80, 60) = 20
The GCF is 20.
The GCF is 20.
The GCF is 40.
The GCF is 40.
The GCF is 20.
If you mean 40 and 80 then the GCF is 40
21 and 42 have a GCF of 21. 40 and 80 have a GCF of 40. The GCF of 21 and 40 is 1.
The Greatest Common Factor (GCF) of 6 and 40 is 2
The GCF of these numbers is 40.
The GCF is 40.