Kantar Analyst interview questions

First had a behavioral interview with pretty standard questions. The second round consisted of a case study. A powerpoint was sent over and I had 15 minutes to look it over. I was then asked some pretty difficult questions, but I think they really just want to see how you can work through the thought process of answering the questions. The last round consisted of 6 behavioral like interviews with 1 or 2 people and a quantitative test with GMAT style questions. Seemed like an attractive position but had another offer.

Went through three rounds of interviews. First round was a screening interview with someone in HR. The second round was a series of 1/2 hour interviews with the hiring manager and directors. The third round was with the hiring manager and VPs.