Orbis Investments Investment Analyst interview questions

Really smart team, had multiple rounds and a final round case study with the PMs. Questions were very intellectual, a lot of brain teasers/problem solving. Overall everyone was really nice, they all seemed to love talking about investing. Performance at Orbis though hasn't been the best and employees echoed that sentiment - a lot of people have been leaving. But for the most part the people who have stayed, stay because of the people/culture which I'm sure is great.

Contacted via recruiter, wasn't really sure what to expect. Brief meeting with senior analyst, some mental maths questions, background, usual stuff. Seem to care about mental maths more than others.