I start my A levels next week and would love to attend Cambridge University to study Psychological and Behavioural Sciences. My A levels were going to be biology, psychology and German. I got an A in further maths, an 8 and 8 9s at GCSE. Will 3 a levels be enough for me to stand a chance at being considered for interview? Should I do maths as a fourth or will I be okay with just 3?