I was wondering if anyone knew what the grade boundaries have been for the past few years on C1, C2 and M1 for Edexcel? I'm keen to know because I think I can scrape 80% on each paper but a friend told me that it wouldn't be enough to get me an A. I'd be grateful if anyone from this pool of experince could share some of their knowledge.
Also, something strange has happened recently. I've forgotten how to factorise completely. I can't really explain it, I comfortably got an A in GCSE maths but now when I'm going over past papers I simply cannot factorise. Can someone tell me how to factorise more complex equations without trial and improvement?
Cheers guys.