30 minutes, many questions on probability / stats, of the type you get in the green book. You get around 45 seconds to answer the questions which is very hard. Interviewer is nice though.
First round was a hard online assessment, very fast paced quick maths. Then a few interview rounds over zoom. Fun questions! Mostly probability, but more about intuition and general problem solving.
Fiz uma entrevista na empresa Five Rings (New York, NY).
Entrevista
The first round was 19 1-minute math problems, I forgot to submit it fast and my multiple correct answers didn't get in. Then I got straight rejection. I am confident in my math level, and I think they just have a very weird interview process.