0
Wiki User
63, 126, 189
Just 90.
It's 72
Multiples of 20 are 20, 40, 60, 80 and 100. For them to be common, they need to be compared to another set of multiples.
It is: 1
3
144
36
18
The GCF is 3.
The GCF is 9.
It is: 252