I am currently self teaching myself A-Level maths and further maths AS and A2 and I am sick of it. You see, I find the content quite interesting, but because I have no guidance, I am doing every single problem in the book and it's all getting too repetitive and boring as hell. To all the mathematicians out there, is it true that those repetitive questions are actually important? Is it like my previous teacher says "mathematics is like becoming a runner. You have to do the boring runs around the field before you can run the marathon". Could I not just learn the theory very well and the proofs and everything, then just do past papers and that's it? or do I have to do every problem that is in the book?