Guides
Quant interview guides
Each guide groups the questions that keep coming up by the technique that solves them, with every problem’s answer on the page and a link to its full worked solution.
Guide · brain teasers
Quant Brain Teasers: The Puzzles Interviewers Actually Ask
The brain teasers that recur in quant trading and research interviews — 12 balls, screwy pirates, two eggs, blue-eyed islanders and more — grouped by the technique that cracks them, with answers.
26 problems · 5 sections
Guide · overview
Quant Interview Questions: What Traders, Researchers and Risk Get Asked
A structured map of quant interview questions — probability, brain teasers, market making, stochastic calculus, statistics and coding — with the questions each role actually gets and worked answers.
43 problems · 7 sections
Guide · probability
Probability Interview Questions for Quant Roles (With Answers)
The probability questions quant interviews ask most — conditioning and Bayes, expected stopping times, counting, the classic hard problems — grouped by technique, with answers.
27 problems · 5 sections
Guide · market making
Market Making Interview Questions: Fair Value, Spreads and Betting Games
The market-making questions trading firms ask — fair value and spreads, adverse selection, Kelly sizing, Dutch books, stopping games, auctions and Fermi estimates — with answers.
19 problems · 5 sections
Guide · Jane Street
Jane Street Interview Questions: What They Ask and How to Prepare
What Jane Street quant interviews test — probability with follow-ups, betting games and market making, brain teasers, random walks — with the recurring questions, answers and a prep plan.
30 problems · 5 sections
Guide · Optiver
Optiver Interview Questions: Mental Math, Options Intuition and Market Making
What the Optiver trader interview tests — the timed math screen, dice and expected value, market-making games, options intuition — with the recurring questions, answers and a prep plan.
29 problems · 5 sections
Guide · SIG
SIG (Susquehanna) Interview Questions: Poker, Probability and Decision Making
What Susquehanna (SIG) trader interviews test — poker-style betting and edge, probability, decisions under uncertainty, options intuition — with the recurring questions, answers and a prep plan.
26 problems · 5 sections