0
Anonymous
16
Wiki User
1 and 5
1 and 2
1, 2 and 4
Common factors of 18 and 20 are: 1 and 2.
1 and 2 are factors common to 6 and 20
11 13 17 19
There are 4. 11 13 17 19
20
60
It is: 180
The answer is 4