The factors of 21 are: 1, 3, 7, 21
The factors of 28 are: 1, 2, 4, 7, 14, 28
84
The GCF is 7.
The Greatest Common Factor (GCF) is: 4
84
Yes.
364
The GCF is 4.
It is: 4
The common factors of 21 and 51 are: 1 and 3
The factors of 21 are 1,3,7, and 21. The factors of 70 are 1,2,5,7,14,35, and 70 The common factors of 21 and 70 are 1 and 7.
The common factors of 21 42 and 84 are 21
The common factors of 21 and 63 are 1, 3, 7, and 21