12, 24, 36, 48, 60, 72, 84, 96
12
4 and 7
3
The GCF is 1.
It is 12
It is 12
5/2
Both 2 and 4.
116
12
Assuming you want an example of one, √10 is an irrational number between 3 and 4. If you want all of them, you're out of luck - there is an infinite number of them.