1
There are none, they are prime numbers.
The common multiples of 11 and 4 are 88, and 4.
7.5
55
77
55
33
176
the common multiples are most all of the multiples of 8
Since 4 is a multiple of 2, all the multiples of 4 will be common.
The first three multiples of 4 are 4, 8 and 12. For them to be common, they need to be compared to another set of multiples.