after this, if you want help on more of these sequence problems, how about showing where you get stuck, or the answer you want to confirm?
If you are trying to say that the commons difference is an integer, then we know it is positive, and divides 73-37=36
so, the difference may be 1,2,3,4,6,9,12,18
However, d must also divide 37-13=24
That narrows our choices to 1,2,3,4,6,12
3 and so on