Answer:
Common difference is 4
Step-by-step explanation:
25 , 29, 33,37,41
ok, maybe you really don't know how to do this, but this is just being plain lazy. any way,
see the B's that have a little 2 on them? image that the other B's also have the same thing, but it's a one.

see all the numbers above the B's? add them all

And you get 6
now take one of your Bs and slap the six on like so

and there's your answer
Yes 1 divided by 2 = 0.5 this is a half
THE ANSWER IS B IM PRETTY SURE