1 and 7
Since 7 is a factor of 28, it is automatically the GCF.
The factors of 28 are 1, 2, 4, 7, 14, and 28. The factors of 16 are 1, 2, 4, 8, and 16. The common factors of 28 and 16 are 1, 2, and 4.
The factors of 28 are 1, 2, 4, 7, 14, 28 The factors of 33 are 1, 3, 11, 33 The only common factor is 1.
The common factors of 28 and 84 are 1,2,4,7,14 and 28.
The common factors of 28 and 84 are 1,2,4,7,14 and 28
The factors of 28 are 1,2,4,7,14 and 28. "Common" means "same for both". For these factors to be common, they need to be compared to the factors of another number.
The common factors of 28 and 63 are: 1 and 7
The common factors of 28 and 49 are 1 and 7.
The common factors of 18 and 28 are 1 and 2
The common factors of 28 and 50 are 1 and 2
Common factors of 28 and 30 are: 1 and 2.
The common factors of 14 and 28 are 14,7,2,1.