The common factors are 1 and 7.
3
It is: 84
The GCF is 3.
Common factors of 21 and 27 are: 1 and 3.
The GCF is 7.
You can factor out a 7 making it 3 and 4.
The factors of 21 are: 1, 3, 7, 21The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56
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 factors of 21 are: 1, 3, 7, 21.The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36.The common factors are: 1, 3
The common factors of 28 and 63 are: 1 and 7