// PREP TRACKS

Quant Interview Prep by Subject

Every subject the trading and quant screens test, each with worked sample questions drawn from the engine behind our mock screens and a short guide to passing that part of the screen.

• Mental Math Quant Interview Prep5 worked questionsTimed arithmetic is the first filter at most trading firms: eighty questions in eight minutes, no calculator, a penalty for wrong answers on some screens. The questions below are drawn from the generators behind our mock screens.
• Probability Quant Interview Prep5 worked questionsProbability is the core of almost every quant interview, from the online assessment to the final round. These questions cover conditioning, Bayes' rule and counting, the three ideas most screens come back to.
• Expected Value Quant Interview Prep5 worked questionsExpected value is how trading firms ask whether you would take a bet. The questions below price games, wagers and payoffs the way a market-making interview does.
• Market Making Quant Interview Prep5 worked questionsMarket-making rounds ask you to quote a two-sided price, manage the position you get filled on and update as information arrives. These questions test the arithmetic underneath that.
• Statistics Quant Interview Prep5 worked questionsQuant research screens test whether you can read data: what a distribution implies, what a regression says and does not say, and when a result is noise.
• Brain Teaser Quant Interview Prep5 worked questionsBrain teasers test how you reason when there is no formula to reach for. The puzzles below come from the logic sections of our mock screens.
• Number Sequence Quant Interview Prep5 worked questionsSequence questions appear on numerical reasoning screens at most market makers. Each one hides a rule; the skill is finding it quickly.
• Options Quant Interview Prep5 worked questionsOptions questions show up in trader and derivatives interviews: parity, payoffs and how the Greeks move as price, time and volatility change.
• Fermi Estimation Quant Interview Prep5 worked questionsEstimation questions test whether you can get within a factor of a few with nothing but reasoning. Interviewers care more about the decomposition than the number.
• Stochastic Processes Quant Interview Prep5 worked questionsRandom walks, Markov chains and stopping rules are standard in quant research and harder trading interviews. These questions test the tools for each.