Land the quant offer.
2,516 problems from real quant interviews — probability, brainteasers, stochastic, microstructure, mental math, and the coding patterns quants actually get asked. 100 free, no card. From $6.99/mo, 7-day refund.
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See pricing
Larger library. Higher quality. Lower price.
70% more problems and 3× cheaper than the next-largest paid platform — with a full walkthrough on every one. Public pricing, May 2026.
| Platform | Cheapest plan | Library size | $/problem |
|---|
| QuantGrind | $6.99/mo |
2,516 | $0.033 |
| Platform A | $19.99/mo |
~1,500 | $0.160 |
| Platform B | $20/mo |
~1,200 | $0.198 |
| Platform C | $30/mo |
~1,200 | $0.299 |
| Platform D | $50/mo |
~600 | $0.962 |
The topics that actually come up
- Probability (1,130)
- Combinatorics (315)
- Options (303)
- Brainteaser (189)
- Stochastic (168)
- Game theory (74)
- Calculus (65)
- Linear algebra (63)
- Coding (63)
- Mental math (62)
- Finance (42)
- Other (28)
- Market making (5)
- Math puzzles (1)
Browse by topic or by firm — Jane Street, SIG, Citadel, Optiver, DE Shaw, Five Rings, IMC, HRT, and more.
Frequently asked questions
- Where do the questions come from?
- Written and edited by quants at tier-1 firms — pulled from interviews they actually sat. Every question is reviewed for clarity and answer correctness before it ships.
- Is the free tier actually usable, or a teaser?
- 100 free problems with full solutions, spanning every topic. No card required, no time limit. Enough to confirm quality before you spend a cent.
- How is this different from other quant prep sites?
- 70% more problems, 3× cheaper per problem, and a public free tier so you can audit quality before paying. Public topic taxonomy and broad firm tagging too — not a black box.
- Is this for SWE coding interviews?
- No — quant interviews only. Probability, brainteasers, stochastic, microstructure, mental math, and the coding patterns quants actually see. Almost no overlap with generic SWE prep.
Start free — no card →