Bain & Company interview questions

I applied online. Received an invitation to a written test within 2 weeks. The written test was not very hard, it involves basic math like percentages and multiplications (beware of big numbers) and you can't use a calculator. After I passed the written test I was invited to a brief workshop about how to do a case interview and was appointed an interview date. There was two rounds of interviews. The first interview was quite hard. It was what I would call a stress test. The interviewer gave a seemingly very vague case and looked disinterested on my responses. The second one was quite easier and the interviewer more engaging. I failed to go through to the final interviews. I recommend at least a month of preparation.