Tbh, I'm currently doing Core Maths (AQA) and it's all more based around business/economics stuff. It's not really relevant to Biology and Chemistry (which I do). However, I'm still taking it because if I get a grade B in it, I can apply for uni courses which ask for a grade 6 or 7 at GCSE Maths. So, if you didn't get a 6 or 7 in GCSE Maths, and you may want to do a Medicine or Chemistry degree, then I'd reccomend it.