Seems a bit of a random thread for thias forum, but I tried asking this question on reddit and I didn't have enough karma to start a thread in /math so gave up with that. 
Whilst I was good at GCSE maths (higher level) I never took the subject at A level and would like to further my knowledge, I could also do with revisiting the GCSE stuff.
Most of the books I've come across are focused on passing exams and tailored to the school syllabus, but I don't know how suitable they are for adults wanting to learn core mathematics.
Whilst for physics and chemistry, first year undergraduate books were suitable for me, the maths ones seem like they might be too advanced for me.
I was wondering if anyone could recommend some good textbooks and workbooks or online courses to set me on the right track?
It would be nice as an extra to be able to take Lv3 maths exams at a college of uni to actually have that qualification in writing.

Whilst I was good at GCSE maths (higher level) I never took the subject at A level and would like to further my knowledge, I could also do with revisiting the GCSE stuff.
Most of the books I've come across are focused on passing exams and tailored to the school syllabus, but I don't know how suitable they are for adults wanting to learn core mathematics.
Whilst for physics and chemistry, first year undergraduate books were suitable for me, the maths ones seem like they might be too advanced for me.
I was wondering if anyone could recommend some good textbooks and workbooks or online courses to set me on the right track?
It would be nice as an extra to be able to take Lv3 maths exams at a college of uni to actually have that qualification in writing.