Was told it would be a consulting style interview that I could not use a calculator for. I got into the meeting and the interview was just a 2 part high-level algebra question. It was nothing like the prep interview video they sent for me to review.

Case-based interview presenting real-world scenarios. Expected to do medium difficulty math-related computations on the fly without a calculator. The interviewer walked me through a series of assumptions and evaluated my reasoning as the scenario unfolded.