Common factors of 28 and 30 are: 1 and 2.
1, 2, 3 and 6
5
120
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 GCF is 15.
90
The LCM is: 150
6
I believe its 15.
The GCF is 2.
The GCF is 5.