Blue Origin Mechanical Engineer interview questions

Screening phone interview opened with immediate hardball questions asking to solve equations on the spot over the phone. Questions were not relevant to position but more theoretical problems from college.

The interviewer showed up 15 minutes late to the 30 minute phone interview. They spent about half the call explaining why the job description was confusing/misleading. They barely asked any questions and seemed to be looking at my resume for the first time during the call. I think the person I was talking to was an engineer and was probably overloaded with actual work.