/sci/ - Science & Math

How normal is it to learn something, then forget about it a little bit later? I feel like if I'm not careful, a lot of the stuff I've learned in early algebra will start to slip away even though I've got the majority of the mechanics and fundamentals down already.

I'm also probably going to take a placement test at my college to skip college algebra since most of it I already went through in intermediate algebra. Does giving myself a week to cover the stuff that I didn't go through sound alright?

Also, is it weird feeling like I have to reconcile between my newfound interests in maths and sciences and more juvenile shit like vidya and comic books? I really want to work in the latter fields but more and more I feel like wanting to actually do more important, 'relevant' stuff.