First it was a phone interview. It was pretty standard personal-fit. Who are you? Why do you want this? Why should we choose you? (Not does exact question but you get the point).
Then it was a numerical reasoning test online. Not that hard. A lot of graphs, some easy calculations. I can not remember if calculator was permitted.
Then there was 2 rounds of interviews. 15 minutes of personal fit, 30 minute of case-solving. Standard business case. When the time was up you changed interviewer with the person in the room next door and you did the presentation for a different consultant.