It is 21
The highest common factor is 21
The greatest common factor is 21
The GCF is 21.
The greatest common factor of 630 , 84 = 42
The Greatest Common Factor of 28, 42, 63: 7
To do this, the first step is to write the numbers as the product of their prime factors. In this case we have: 42 = 2x3x7 63 = 3x3x7 The next step is to identify common factors. In this case both numbers have a 3 and a 7 as factors. Take these numbers and multiply them together to find the HCF: 3x7 = 21 Thus the highest common factor of 42 and 63 is 21.
The highest common factor is 9
The greatest common factor of the numbers 63 and 15 is 3.
3The GCF is: 2121.The GCF is 21.
The GCF is 7.
Answer: 7.
21