The recruitment process starts with a short math skills test. You have to answer correctly as many questions as possible in the alloted time. If you do well you get invited to the first round of interviews. In the first round I was interviewed by a Consultant and a Project Leader. The first interview was more open-ended and consisted mainly in checking whether you had some understanting of basic bussiness concepts and why were you interested in the company (prepare this answer. Not just consulting, but BCG). The second one was about determining the market size for a specific economic activity (real estate developers, in my case). The second round of interviews was with two principals and a partner. The first interview was about suggesting improvements to a company (a sandbox type of question, in my experience, I would guess the idea is to understand how you think), the second one was a brain teaser (think "How many tennis balls could you fit in a Boeing 787) while the third interview, with the partner, was about the strategy a retailer should follow to increase its sales.