To calculate the GCF you first have to split the numbers into their prime factors:
28 = 2x2x7
12 = 2x2x3
20 = 2x2x5
The next step is to identify any common factors. In this case, all three numbers have two 2s. Multiply these together and you get 4. Therefore the GCF of 28, 12 and 20 is 4.
The GCF is 4.
The GCF is 4.
The GCF of 20 and 28 is 4
The GCF is 4.
The GCF of 12, 4, and 28 is 4.
The GCF is 4.
The Greatest Common Factor (GCF) of 20 and 28 is 4.The factors of 20 are 1, 2, 4, 5, 10, and 20The factors of 28 are 1, 2, 4, 7, 14, and 28The common factors are: 1, 2, 4The Greatest Common Factor (GCF) is: 4
GCF(20, 28) = 4
The GCF is 4.
12 = 1,2,3,4,6, 28 = 1,4,7 So the greatest common factor is
The GCF is 4.
The GCF is 4.