I'm a year and a half into an International Relations degree but I'm not enjoying and don't think it meets my skills, I would like to do Economics and/or Computer Science instead, but anywhere decent requires Maths A-level to do so. I got an 8 in GCSE Maths but have not studied it since, I'm prepared to self-study for hours a day as I'll have no other commitments, in time to enter A-level exams next June. Is this *at all* doable?