I have my first round McKinsey case interviews (Associate position) coming up at the end of the year. Postponed due to personal reasons -HR asked me to phone in again and book a suitable time later in the year and I am therefore using the time to practise as much as I can.
My problem is I really am not doing well with the quant calculations in terms of knowing the approach to use to solve the case (not framework - mathematical approach). When I look at the answers I ask myself why certain numbers were multiplied/divided as it would never have otherwise occured to me to perform the calculation in that particular method. Can ANYONE please please tell me if this problem is normal and how to go about it. I am beginning to get really discouraged. Ironically I got an A in Math in school (haha) but I cant seem to wrap my head around why some calculations were carried out using the math approach used in the cases(s).