I have applied for the graduate position in quant researcher. The first step of the interview process is an online assessment (OA) covering math and sequences. One week to complete.

online assessments, math problems, probability, statistics, continue the sequence, green book inspired, very limited time for all questions. online assessment consisted of 18 simple probability and combinatorics questions in 30 minutes. second online assessment a few days later consisted of ~5 minutes of mental math and ~5 minutes of completing sequences.