i have some of my analysis regarding exam so i would like to put it here:
let's divide it in two parts paper wise so Paper 1 has maths question which was tough and tough to score 25+ in maths section out of 50. i know to score 25 is also tough but it's GPSC so we have to take this standard at least and out of 150 we can consider 45 marks . if you can able to score 75+ in paper 1 than you are at par. trust me
paper 2: it was not easy but people are just comparing with paper 1. but paper 2 was most tricky paper so very tough to score 85+
so i think if you get 150+ according to key. you should start preparing for Mains. if you are waiting for result and than you will start preparing than my friend you are out of the race.