You should focus on these chapters specially:
MATHEMATICS: PART-1 : Ch # 3,4,6,7,8,12 PART-2 : Ch # 1,4,6
PHYSICS : PART-1 : Ch # 2,3,4,5,7,9,10 PART-2 : Ch # 12,13,14,15,16,19,21
CHEMISTRY : PART-1 : Ch # 3,4,5,6,8,11 PART-2 : Ch # 1,3,4,7,8,9,10,11,12,13,14
My suggestion, if you have studied well in part 1 and part 2; you don't need to waste time on it if you aren't done with phy and maths. Because maths mcqs are like 80, physics 60, chem 30, english 20 and intelligence 10. For maths, you can completely ignore Integration, differentiation provided you know their formulae well. Basic differentiation or integration may be there but I wasn't too troubled by it in both of my attempts. AND, you should focus on the intelligence portion. They are good 8-9/10 marks easily and you can easily get 15-17/20 marks in English. Which field do you aim to apply? Btw, no problem. We can talk on fb, that'd be easy for me because I don't open Pakgamers much.