Rimm Kaufman Group interview questions

I received an interview by reaching out to an employee who then connected me with a recruiter. The recruiter followed up 2 weeks after for a phone interview, and then scheduled an in-person interview with a three person panel.

first round was phone interview with the person who originally reached out to me, second round was go to meeting with 3 people (original person, team lead for potential position, and HR person), third round was in person and I met those 3 people again and then several other executive people ...was shown around office..all rounds were difficult because they ask you math questions to test your ability to think on the spot and analytical skills