Probability and knowing a little game theory helps too.
Quantitative Research Intern Interview Questions
4,831 quantitative research intern interview questions shared by candidates
Show us a poster or paper etc from your PhD and talk us through it.
One question that need to consider different cases, start from bas case. The other one is a standard probability of 3D cube, asking for probability that your small cube has red face.
What would your coworkers say if asked to describe you?
Card question, probability and statistics
Compute the probability of an overlap of arrivals.
Are you more interested in research, trading, technology?
"Basic" probability, statistics, and calculus questions. The questions could all have been solved with a brute-force method, but there was a time limit, so it was clear you were supposed to know some clever way of figuring out the answer quickly. The quick method was obvious for some questions and really not for others, and again would be much more obvious if intro stats and calculus were topics you used daily even years after completing the courses.
four probability questions (dice, cards)
Making some sort of arbitrage in a simple trading scenario
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