I've not long completed my second year studying maths at university, and received my results yesterday. And without wanting to go into details, I'm incredibly pleased with them. I'm currently on a first (i.e. 70%+) but now I have to make a fairly big decision, one which I should've made a while ago.

As it stands, I have only one more year left at uni (as an undergraduate at least). However, I have the option to stay on for a fourth year, to complete a masters. Given my results, this...