Umm...I don't know exactly how MUCH time I did for maths last yr.
I do remember I did maths A LOT. Well, I did other subjects only when cramming for assessments, or catching up things but other time was for maths (even in my study halls and else, though it was rare that I got my time for maths effective because X2 is mainly discussion and during discussion we can go over everywhere >.<)...
At least 1 1/2 hour fairly effective everyday, I guess (except when I needed to cram for other subjects or there were research papers and stuff)
It is not the question of how many hours but more to how many hours effective, I think?