Nine: 1 2 4 5 10 20 25 50 100.
One and nine will go into both numbers evenly
One.
5
1, 2, 5, 10.
The numbers that go into 30 are1, 2, 3, 5, 30, 15, 10, 6
5
1 and 2 will go into both numbers evenly
No, but these numbers do go into 20 evenly: 1, 2, 4, 5, 10, 20.
Multiples of 360.
Only the number one.
Any multiple of 360.