Dear Experts / Preplounge,
I understand that some firms (e.g. BCG) strictly do cases in 25 min. Is my understanding right that to achieve this they, at times, direct you (post running them through your structure) on where to start looking at the case? And then once you have shown them that you can do math well, they might provide the remaining maths answers (if needed for time)? With both of these steps designed to make sure you get through the case in 25 min.
If not the above, do they just see if you can go fast enough whilst remaining strucutred / composed.