Top Jane Street Quantitative Research Interview Questions Explained
Quantitative research interviews at top trading firms like Jane Street are renowned for their rigor, creativity, and testing of true mathematical intuition. If you’re preparing for a quant research or trading role, it’s invaluable to see the types of questions you might face—especially the format and the level of detailed, logical reasoning expected. This article shares a firsthand experience of a Jane Street quant research interview HackerRank test, along with thoroughly explained solutions to each question. Whether you’re actively interviewing or just want to hone your probability and problem-solving skills, these sample problems and solutions will help you practice and prepare for your next big opportunity.
The HackerRank test described here consisted of 4 questions, to be solved in 30 minutes. Each is designed to probe your understanding of probability, expected value, and optimal decision-making—core skills for any quant research or trading role.
We randomly select 4 numbers from the set of the first 16 prime numbers, without replacement. What is the probability their sum is even? Why?
