Amazon Operation Manager interview questions

Generally well organized and efficient. Good communications throughout the process with a number of recruiting personnel involved. Initial phone interview was very relaxed and friendly, contained a good overview of the job requirements and because it was conducted by a current Operations Manager, it was relevant and informative. He read out the 2 behavioral style questions and didn't do the math test because it han't been sent out prior to the interview. From application to the first interview was about 2 weeks (I applied from a LinkedIn job posting). The day after the phone interview, I was contacted by the recruiter to let me know that the interview had gone well and I was invited to attend an onsite interview a week later in Los Angeles. I was given all of the information I needed and all of the travel arrangements (rental car and good standard hotel) were made by them. I had to complete a 2 page written exercise, another behavioral style question (using initiative in a difficult circumstance that brought about beneficial change - one of 2 questions to choose from) and submit that within 2 days of receipt. I then received emails from the senior recruiter with additional information about how the on-site interview would be conducted - again, very informative and excellent for preparation. The on-site interview started at 7am with a facility tour from an Operations Manager called James (really chilled guy who obviously enjoyed his job and was a great advert for the company). After the tour, the 5 candidates were given a math flow problem with 15 minutes to solve it. We all finished it with time to spare and it was a little like Sudoku (fill in as many variables from the information given then work through each element). There were 4 interviewers, a General Manager, 2 Operations Managers, and a HR manager. They were all very professional and well-prepared - each of them had prepared questions from my resume. Each interview lasted 45 minutes and the most challenging is the one that goes through the written question and the math test. It goes into more detail and then has a further math test question based on a more complex version of the original scenario. They are very keen on the STAR answer format and the 14 Principles of Leadership (relate your answers to the principles as much as possible).