36 - 21 = 1536 - 21 = 1536 - 21 = 1536 - 21 = 15
The GCF is 3.
51
The gcf of 6, 15, and 21 is 3. But once you throw that 19 in there, it's ' 1 '.
3
The GCF is 3.
The GCF is 3.
The GCF is 1.
The GCF is 3.
The GCF is 3.
15
The GCF is 3.
36 - 21 = 1536 - 21 = 1536 - 21 = 1536 - 21 = 15
The GCF is 1.
The GCF is 3.
The GCF is 3.
36, 14 and 21 have no common factors other than 1. Therefore, the greatest common factor is 1.