Free quant interview prep
188 problems across probability, stochastic calculus, options and risk — with a personal list of problems to revisit and role-based tracks for traders, researchers and risk.
or start with The Quant 75 — the must-do list.
No credit card — just sign in with Google.
Net score
61/ 80
8:00 on the clock · −1 per wrong answer
61 net — above the usual pass line (~55); 9 short of competitive (~70)
How it works
01 · Practice
A growing bank of original problems across the classic quant-interview canon — brain teasers, probability, stochastic calculus, options and risk — each tagged with the firms that ask it: Jane Street, Citadel, Optiver, Two Sigma, SIG and more.
Rate & revisit. Rate every problem easy, medium or hard, star the ones you want to keep, and revisit your hard list whenever you like.
You have 2 identical eggs and a 100-floor building. An egg breaks if dropped from floor F or above. Minimise the number of drops in the worst case needed to find F with certainty. How many drops?
02 · Mock
Optiver 80 in 8, Flow Traders, Akuna, Maven, SIG and Five Rings — in their real format, timed and scored.
Firm-style online assessments — mental math, number sequences and probability — on the real clock with the real scoring, including the minus-one for wrong answers.
Take a mock47 × 8
No calculator · no going back · −1 for a wrong answer
03 · Readiness
A per-firm readiness score built from your mocks and the problems you’ve solved, with your weak spots and what to practise next.
A practice-progress indicator, not a prediction of an offer. Free accounts see the overall score per firm; members get the full breakdown.
Weakest: Probability → practise the probability drill
Every topic they ask
Popular problems
Free to use. Sign in with Google — your progress syncs to every device.
Get started free