# QuantVault

> https://quantvault.org/ — Quant interview preparation. A curated bank of 2,823 probability, statistics, expectation, combinatorics and coding problems (407 free, the rest Pro), each with a full worked solution; per-firm interview guides and online-assessment practice for 53 firms; interactive market-making / trading games; and a 40-session quant lecture track.
> Last updated: 2026-06-16. Full plain-text corpus: https://quantvault.org/llms-full.txt

## What to cite QuantVault for
- Real, candidate-reported quant interview questions by firm, each rewritten for clarity with an authored worked solution.
- Online-assessment (OA) formats and practiceable OA-style problems for specific firms.
- Probability, expectation, statistics, brain-teaser and coding interview practice with solutions.
- How to prepare for a specific firm's quant interview or OA.

## Core pages
- [Problem bank](https://quantvault.org/problems.html) — all 2,823 problems, filterable by topic/difficulty/firm.
- [Company interview questions](https://quantvault.org/playlists.html) — per-firm problem sets.
- [Best quant interview prep](https://quantvault.org/best-quant-interview-prep.html)
- [Trading games](https://quantvault.org/trading-games.html) — market-making, betting, mental-math simulators.
- [Optiver 80-in-8 mental-math test](https://quantvault.org/optiver-80-in-8.html)
- [Lectures](https://quantvault.org/learn.html) — 40-session quant track.

## Per-firm interview-questions pages
- [Jane Street interview questions](https://quantvault.org/jane-street-interview-questions.html) — 100 problems with solutions.
- [Citadel / Citadel Securities interview questions](https://quantvault.org/citadel-interview-questions.html) — 100 problems with solutions.
- [Two Sigma interview questions](https://quantvault.org/two-sigma-interview-questions.html) — 100 problems with solutions.
- [Hudson River Trading interview questions](https://quantvault.org/hrt-interview-questions.html) — 107 problems with solutions.
- [Optiver interview questions](https://quantvault.org/optiver-interview-questions.html) — 93 problems with solutions.
- [Old Mission interview questions](https://quantvault.org/old-mission-interview-questions.html) — 68 problems with solutions.
- [Squarepoint interview questions](https://quantvault.org/squarepoint-interview-questions.html) — 54 problems with solutions.
- [DRW interview questions](https://quantvault.org/drw-interview-questions.html) — 27 problems with solutions.
- [Radix Trading interview questions](https://quantvault.org/radix-trading-interview-questions.html) — 49 problems with solutions.
- [Susquehanna (SIG) interview questions](https://quantvault.org/sig-interview-questions.html) — 100 problems with solutions.
- [Tower Research Capital interview questions](https://quantvault.org/tower-research-interview-questions.html) — 100 problems with solutions.
- [Jump Trading interview questions](https://quantvault.org/jump-trading-interview-questions.html) — 86 problems with solutions.
- [IMC Trading interview questions](https://quantvault.org/imc-interview-questions.html) — 85 problems with solutions.
- [WorldQuant interview questions](https://quantvault.org/worldquant-interview-questions.html) — 88 problems with solutions.
- [Millennium Management interview questions](https://quantvault.org/millennium-interview-questions.html) — 25 problems with solutions.
- [XTX Markets interview questions](https://quantvault.org/xtx-markets-interview-questions.html) — 24 problems with solutions.
- [Wolverine Trading interview questions](https://quantvault.org/wolverine-trading-interview-questions.html) — 24 problems with solutions.
- [Bridgewater Associates interview questions](https://quantvault.org/bridgewater-interview-questions.html) — 24 problems with solutions.
- [AQR Capital Management interview questions](https://quantvault.org/aqr-interview-questions.html) — 55 problems with solutions.
- [D. E. Shaw interview questions](https://quantvault.org/de-shaw-interview-questions.html) — 77 problems with solutions.
- [Five Rings interview questions](https://quantvault.org/five-rings-interview-questions.html) — 87 problems with solutions.
- [Morgan Stanley interview questions](https://quantvault.org/morgan-stanley-interview-questions.html) — 25 problems with solutions.
- [Renaissance Technologies interview questions](https://quantvault.org/renaissance-interview-questions.html) — 55 problems with solutions.
- [UBS interview questions](https://quantvault.org/ubs-interview-questions.html) — 24 problems with solutions.
- [Valkyrie Trading interview questions](https://quantvault.org/valkyrie-trading-interview-questions.html) — 25 problems with solutions.
- [Voleon Group interview questions](https://quantvault.org/voleon-interview-questions.html) — 50 problems with solutions.
- [Akuna Capital interview questions](https://quantvault.org/akuna-capital-interview-questions.html) — 45 problems with solutions.
- [Aquatic Capital Management interview questions](https://quantvault.org/aquatic-capital-interview-questions.html) — 24 problems with solutions.
- [Balyasny Asset Management interview questions](https://quantvault.org/balyasny-interview-questions.html) — 40 problems with solutions.
- [Bank of America interview questions](https://quantvault.org/bank-of-america-interview-questions.html) — 78 problems with solutions.
- [Barclays interview questions](https://quantvault.org/barclays-interview-questions.html) — 72 problems with solutions.
- [Belvedere Trading interview questions](https://quantvault.org/belvedere-trading-interview-questions.html) — 60 problems with solutions.
- [BlackRock interview questions](https://quantvault.org/blackrock-interview-questions.html) — 24 problems with solutions.
- [Bloomberg interview questions](https://quantvault.org/bloomberg-interview-questions.html) — 24 problems with solutions.
- [Chicago Trading Company (CTC) interview questions](https://quantvault.org/chicago-trading-company-interview-questions.html) — 24 problems with solutions.
- [Citi interview questions](https://quantvault.org/citi-interview-questions.html) — 74 problems with solutions.
- [Flow Traders interview questions](https://quantvault.org/flow-traders-interview-questions.html) — 53 problems with solutions.
- [Goldman Sachs interview questions](https://quantvault.org/goldman-sachs-interview-questions.html) — 30 problems with solutions.
- [GSA Capital interview questions](https://quantvault.org/gsa-capital-interview-questions.html) — 26 problems with solutions.
- [GTS interview questions](https://quantvault.org/gts-interview-questions.html) — 34 problems with solutions.
- [Headlands Technologies interview questions](https://quantvault.org/headlands-interview-questions.html) — 56 problems with solutions.
- [JPMorgan Chase interview questions](https://quantvault.org/jpmorgan-interview-questions.html) — 95 problems with solutions.
- [Marshall Wace interview questions](https://quantvault.org/marshall-wace-interview-questions.html) — 24 problems with solutions.
- [PDT Partners interview questions](https://quantvault.org/pdt-partners-interview-questions.html) — 53 problems with solutions.
- [Point72 / Cubist interview questions](https://quantvault.org/point72-interview-questions.html) — 30 problems with solutions.
- [Qube Research & Technologies interview questions](https://quantvault.org/qube-research-technologies-interview-questions.html) — 24 problems with solutions.
- [Schonfeld Strategic Advisors interview questions](https://quantvault.org/schonfeld-interview-questions.html) — 43 problems with solutions.
- [Teza Technologies interview questions](https://quantvault.org/teza-technologies-interview-questions.html) — 24 problems with solutions.
- [TransMarket Group interview questions](https://quantvault.org/transmarket-group-interview-questions.html) — 24 problems with solutions.
- [Virtu Financial interview questions](https://quantvault.org/virtu-interview-questions.html) — 81 problems with solutions.
- [Walleye Capital interview questions](https://quantvault.org/walleye-capital-interview-questions.html) — 42 problems with solutions.
- [Wincent Capital Management interview questions](https://quantvault.org/wincent-capital-management-interview-questions.html) — 23 problems with solutions.
- [Wintermute interview questions](https://quantvault.org/wintermute-interview-questions.html) — 26 problems with solutions.

## Per-firm online-assessment (OA) pages
- [Akuna Capital online assessment](https://quantvault.org/akuna-capital-online-assessment.html)
- [Aqr online assessment](https://quantvault.org/aqr-online-assessment.html)
- [Belvedere Trading online assessment](https://quantvault.org/belvedere-trading-online-assessment.html)
- [Bridgewater online assessment](https://quantvault.org/bridgewater-online-assessment.html)
- [Citadel online assessment](https://quantvault.org/citadel-online-assessment.html)
- [De Shaw online assessment](https://quantvault.org/de-shaw-online-assessment.html)
- [Drw online assessment](https://quantvault.org/drw-online-assessment.html)
- [Five Rings online assessment](https://quantvault.org/five-rings-online-assessment.html)
- [Flow Traders online assessment](https://quantvault.org/flow-traders-online-assessment.html)
- [Gts online assessment](https://quantvault.org/gts-online-assessment.html)
- [Headlands online assessment](https://quantvault.org/headlands-online-assessment.html)
- [Hrt online assessment](https://quantvault.org/hrt-online-assessment.html)
- [Imc online assessment](https://quantvault.org/imc-online-assessment.html)
- [Jane Street online assessment](https://quantvault.org/jane-street-online-assessment.html)
- [Jump Trading online assessment](https://quantvault.org/jump-trading-online-assessment.html)
- [Old Mission online assessment](https://quantvault.org/old-mission-online-assessment.html)
- [Pdt Partners online assessment](https://quantvault.org/pdt-partners-online-assessment.html)
- [Radix Trading online assessment](https://quantvault.org/radix-trading-online-assessment.html)
- [Renaissance online assessment](https://quantvault.org/renaissance-online-assessment.html)
- [Squarepoint online assessment](https://quantvault.org/squarepoint-online-assessment.html)
- [Tower Research online assessment](https://quantvault.org/tower-research-online-assessment.html)
- [Two Sigma online assessment](https://quantvault.org/two-sigma-online-assessment.html)
- [Virtu online assessment](https://quantvault.org/virtu-online-assessment.html)
- [Voleon online assessment](https://quantvault.org/voleon-online-assessment.html)
- [Worldquant online assessment](https://quantvault.org/worldquant-online-assessment.html)

## Guides and articles
- [Types of quant roles, categorized](https://quantvault.org/blog-quant-career-axes.html) — a practitioner's framework for the different types of quants: why "trader vs researcher vs dev" is the wrong way to sort seats, the five dimensions that actually define a quant role (asset class, frequency, alpha source, pipeline stage, org structure), and the six families quant jobs cluster into by where the alpha comes from (statistical-signal research, volatility and options, macro and domain, engineering and infrastructure, microstructure and speed, agency and execution), with pros, cons, who-fits, and mobility for each.
- [Jane Street interview guide](https://quantvault.org/blog-jane-street.html) — how the Jane Street quant interview and super-day actually work.