Some years back I applied to join IBM’s grad scheme, there was a peculiar stage to the process I’ve not seen elsewhere. It was during the onsite day, where a batch of 20 or so applicants were put through various tests in an IBM office. They called it the “group test”; around 8 of us were led to a room and asked to solve a puzzle together. Each of us was given an information pack, there was a white board, and a timer ticking down from 60 minutes.