Five Rings
Probability-heavy interviews with mental math drills
Source confidence: Candidate reports · Last reviewed: 4 Jun 2026. Exact process varies by role, office, and year.
Five Rings is a proprietary trading firm with offices in New York and London. They describe themselves as a team-first meritocracy aiming to "find opportunities first and profit from them quickly," with quants, developers, and traders working in continuous cycles where strategies move from insight to implementation within days. Official role descriptions emphasize mathematical proficiency, trading models, collaboration with traders and developers, and clear communication of research. Candidate reports often describe probability, estimation, mental math, and expected-value questions.
Interview Rounds
Interview processes vary by role, office, seniority, and year. We separate official company information from candidate-reported details where possible.
Round 1:Online Assessment
Fast math, probability, and estimation. Candidate reports describe ~19 timed questions where you give a lower/upper-bound estimate rather than an exact answer.
Round 2:Technical Phone Screen
Probability puzzles and combinatorics. Conversational — they want to follow your reasoning live.
Round 3:Super Day
Multiple back-to-back rounds with traders. Expected value games, market making scenarios, and brainteasers.
Round 4:Final / Fit
Cultural fit and motivation discussion with senior staff.
Focus Areas
Start here — free
Free warm-ups in Five Rings's focus areas. No account required.
36 Five Rings interview problems
Real questions tagged from Five Rings interviews, with full editorials and hidden tests.
Unlock with PremiumYour Five Rings prep path
The guide above is firm-wide. This checklist is role-specific where sourced.
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Suggested pace: about 7 days. This is a guide, not a firm-prescribed schedule. Every step below is tied to public sources for Five Rings.
Practice quick quantitative reasoning
Complete timed sessions, prioritizing clean accuracy before pushing your pace.
Based on candidate-reported evidence; treat exact formats as reported patterns, not firm guarantees.
Unlock with PremiumSolve probability, statistics, and model-reasoning problems
Work through targeted problems and review every miss by topic before moving on.
Firm-tagged filters require Premium; free warm-ups still count toward this step.
Supported by official sources plus candidate-reported details; exact formats can vary by role, office, and year.
StartFive Rings insider tips
Premium unlocks the full Five Rings path: all 36 tagged interview problems, what makes Five Rings different, preparation tips, and recommended learning paths.
Upgrade to PremiumBased on publicly available candidate interview reports and curated problem patterns; interview processes vary by role, office, and year. Last reviewed June 2026. QuantReady is not affiliated with, endorsed by, or sponsored by Five Rings. All company names and trademarks are the property of their respective owners.