IMC Trading Probability Interview: Green Book Style Questions
IMC Trading's probability interviews are built in the style of the famous "green book" — fast, verbal, market-making-flavored probability puzzles. If you haven't drilled this exact style, you will freeze on questions that practiced candidates answer in seconds.
What the Probability Interview Is
In technical rounds, IMC interviewers fire rapid probability questions at you: card draws, dice games, coin sequences, and betting scenarios with a trading twist. You're expected to think out loud, compute quickly, and often frame the question as a market-making problem — "what price would you quote for this game?" Speed and clear reasoning matter as much as the final number.
What the Probability Questions Assess
These questions test mental math, probabilistic intuition, and comfort with uncertainty. IMC isn't checking whether you memorized formulas — it's checking whether you can decompose a novel gamble into expected value in real time, update your view as information arrives, and stay calm when the interviewer adds a twist mid-question. Every question is secretly a trading simulation: price the risk, manage the uncertainty, decide.
How to Prepare: Green Book Style Drilling
The green book style has a specific flavor — learn it. First, work through the classic problem families: conditional probability, expected value of games, Bayesian updates, and order statistics. Second, practice out loud under time pressure, because silent solving doesn't transfer to interviews. Third, always add the trading layer: after solving, ask yourself what fair price you'd quote and how wide your spread would be given your uncertainty.
Our prep guide includes the exact green book style probability questions IMC Trading asks, with worked solutions and the market-making framing interviewers want to hear — the closest thing to sitting the interview twice.
Unpracticed Candidates Don't Survive This Round
The questions aren't impossibly hard — they're impossibly fast if you haven't seen the style. For the 2027 intake, every serious candidate has drilled hundreds of these. Walking in without that reps base means thinking through basics while your competitor is already quoting prices. In probability interviews, preparation is the entire game.
FAQ
What is the "green book" for trading interviews? It's the nickname for the classic collection of quantitative interview puzzles — probability, expected value, and game-theory questions used across prop trading firms.
How hard are IMC's probability questions? Moderate math, brutal pacing. The difficulty is thinking clearly in under a minute, not advanced theory.
Should I memorize solutions? No — memorize patterns. Interviewers change the numbers; what transfers is the decomposition method.
How many probability questions per interview? Expect a rapid sequence of 5–10 short questions per technical round, often escalating in difficulty.
Preparing for IMC Trading's probability test? Our 2027 IMC Trading Assessment BrainsFirst Games NeurOlympics Exact Questions and Answers has the exact questions and answers — $79 one-time, instant download.
