Jane Street · Brain Teasers

Jane Street Brain Teasers Interview Questions

Brain teasers test structured thinking under pressure — logic puzzles, invariants and clever counting that interviewers use to see how you reason, not just what you have memorised. Jane Street is a proprietary trading firm known for ETF and options market-making and a famously probability- and mental-math-heavy interview process. Below are 8 brain teasers problems of the kind asked at Jane Street.

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