For OA, 2 minutes for each question, with math and stats questions. You need to have strong math background and calculate quickly. I think in the previous years, this part is in the interview, but this year it's in the OA session.
Other Quantitative Research Intern interview reviews for Five Rings
I applied online. The process took 2 weeks. I interviewed at Five Rings (New York, NY) in Oct 2025
Interview
Received my online assessment one week after application from HR, i was given a week to complete it. I asked a time extension due to a planned trip but ghosted by HR. I don't think they care anyway.
Interview questions [1]
Question 1
Tricky probability, linear regression, testing, calculus problems.
Second Round Interview. The interviewer is knowledgable and nice. Multiple technical questions relating to your resume. Questions can be difficult so be well prepared. Also some problems with probabilities and statistics.