Practice
1040 questions with worked solutions, and timed tests that open in their own window at real exam pace. Every question, answer and worked solution is open, with no sign-up. Start with what you are preparing for.
- 1040
- questions
- 17
- topic banks
- 4
- exam formats
Choose what you are preparing for
Question banks every answer worked in full, timed tests at exam pace
Quant trading and research
500 questions
Quant interviews
Interviews at firms such as Jane Street, Citadel, Optiver and SIG, from probability puzzles to stochastic differential equations.
MBA admissions
239 questions
GMAT Focus
Quant, Data Insights and Verbal in the real formats, each question with a worked solution and a percentile level.
MBA and graduate school
120 questions
GRE
Quantitative comparison, numeric entry and data interpretation, each with a worked solution and a percentile level.
Executive MBA
91 questions
Executive Assessment
Integrated Reasoning and Quant for Executive MBA applicants, timed in the real two-module format.
Oxford and Cambridge
90 questions
MAT, TMUA and STEP
Admissions-test mathematics at the level of the real papers, with full worked solutions and timed papers.
Courses lessons with step-by-step pictures, and code that runs in the page
Software and quant developer
195 problems
Coding interviews
Pattern-first lessons, an editor that runs your code, solutions in six languages and a timed interview with a report.
ML engineering and research
41 problems
Machine learning coding
The implementation round, written from scratch in NumPy with a live Python editor and the tests an interviewer would use.
Quant developer · C++
75 lessons and drills
Low-latency C++ for HFT
The systems round at trading firms: object lifetime, caches, atomics, the network and order books.
Who writes these
I am a working high-frequency trading quant. I have an MBA from London Business School, where I specialised in quantitative finance and now interview applicants, a master's in computer science from Oxford and a master's in financial engineering. I write every question and every solution here myself.
Beyond the questions I work with a small number of people each year on quant careers, MBA admissions and Oxbridge and US STEM applications. The first conversation is free and lasts twenty minutes.
Common questions
Do I need an account?
No. Every question, answer and worked solution is open, and so are the timed tests and Ask AI.
How close are the timed tests to the real exams?
Each one opens in its own window and follows the format of the test it copies: the GMAT Focus section timer with bookmarks and a review-and-edit screen, the GRE toolbar with Mark, Review and an on-screen calculator, the computer-based layout used for admissions tests, and the one-question-at-a-time online assessment that trading firms use.
Are these real past questions?
No. Official questions belong to GMAC, ETS and the universities, and are published in their own guides and past papers, which you should also use. Everything here is original, written to the same formats and levels.