Old Mission Graduate Quant Trader interview questions

It's a typical trading interview where the interviewer is extremely rude for no reason. Came 20 minutes late, didn't even apologize, and asked me to "tell him about myself" about 5 times in a row. Some brainteasers too. I understand that traders should be able to perform under pressure, but there is a big difference between pressuring an applicant by asking interesting/complex problems and just being plain unprofessional and rude.

starts with OA and then a few rounds of interviews, final with one of the head trader/HR people. lots of probability and dice questions. some mental math in there as well