Sligthly OT, but I always have fun reading these maths posts here: I enjoyed maths in University very much (I did CE) and the joy from my professors always inspired me. I'd love to learn more and dip into solving things with it (maybe with a hang towards numerics?).

But been out of Uni for 2 years now and haven't done much, so probably gotta relearn quite a bit. Does anyone have some good ideas where to start and find fun ideas? Not numerics, but I did quite a few projecteuler problems during my bachelors - maybe there is more like this? Any ideas welcome.

Or should I redo all tasks in my textbooks first? ;-)