You first get a mental math test with a sequences part. I don't think I did too well but still passed. Then you take a coding test. The difficulty of the questions vary from easy to extremely hard so pray you don't get a hard one. I got two medium questions and a very hard one and didn't pass this round.

First math online Second video Quick coding test then followed by two phone interviews. Good understanding of probability and quick decision making would make things easy. Know the Green book, especially the EV part in detail