How can I p my Maths GCSE?

Ok so I am only in year 9 and instead of taking my year 10 maths exam next year I am taking it a year early but the teacher is not taking it seriously I have the exams next week and he only told us what was in it and gave us a short revision lesson YESTERDAY. I will be taking an intermediate paper because I am only half way through the GCSE course, So I have been on GCSE bitesize and have been sitting these intermediate exams but they don't exist anymore so it's hard to find new ones. How can I p? (My first one is Tuesday) I also have really big trouble with shapes and always joke i'm shape dyslexic is there such a thing because I can't do rotation, symmetry and reflection even though I can draw in art really well, so any tips with the whole paper will be gladly appreciated xx