Go through PM thoroughly. And even last 3-4 attempts RTP, suggested. I got 58 marks in 3 consecutive attempts, yes same in 3. But that's the only trick and even use some smart techniques like solve questions while practising much in mind instead of paper. Even while having first reading, after reading question try it on your own, so your brain starts thinking in that direction. If u see normally there is just one single trick in question so just go for that trick insted of whole question.
There are many such things u can use and learn smartly subject. Even there is something like u need conceptual understanding of formulas.