what is the greatest common factor of 9,15,and 21
The greatest common factor of 18 and 21 is 3.
The Greatest Common Factor of 14 and 21 is 7.
21 can not be divided by 2, ergo it can not be a common factor with 72
21 itself is the greatest common integral factor, since 21 X 2 = 42.
21 is the largest factor of 21
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
Because 21 is a factor of 63. 21 is the greatest factor of 21. A larger number doesn't exist.
Aside from itself (21), the highest integer factor of 21 is 7.
The greatest common factor of 21 and 63 is 21.Since 21 is a factor of 63, it is automatically the GCF.
Since 21 is a factor of 147, it is automatically the GCF.
Since 21 is a factor of 105, it is automatically the GCF.
The Greatest Common Factor of 21, 63, 84: 21
The greatest common factor of 21 and 77 is 7.
There are two factor pairs of 21: 21 = 1 x 21 21 = 3 x 7
The GCF is 21.
The common factor of 3 and 21 is 3. *