Amazon Area Manager I interview questions

I was contacted by the Military Relations Recruiter for a preliminary phone screen. We then set a formal phone interview for the next week. A week later I was invited to interview on site. Once on site, I interviewed with 4 different people in a round robin fashion. Each interview last approximately 30 minutes. I was on site from 8 am to noon.

Two interviews in the same day on campus. One with a "Campus Recruiter," one with an Operations Manager from a nearby fulfillment center. Case study and labor allocation math problem. The offer was given less than 24 hours later. Recruiter asked behavioral interview questions and didn't seem to actually have much information on the actual position itself. Operations Manager reviewed case study and math portion and answered more specific questions.