Quant Trader track
Quant Trader practice
Mental math, EV, Make Me a Market. Follow the three steps, then pick any module below. Free practice, no sign-up.
Demo — sample dataIllustrative numbers. There is no live data yet.
- Sample sightings / 24h
- 318
- Sample report lag
- 11m
- Sample .edu share
- 94%
Practice
Answers stay in your browser. Only anonymous right and wrong counts are sent.
8-minute arithmetic screen: 80 questions in 8 minutes · free, no sign-up
Arithmetic: 60-second sprint or 8-minute arithmetic screen
Demo only. Scores are estimates against an assumed model, not against real candidates. Nothing is stored unless you switch on score history.
90% confidence intervals are in the Calibration and Fermi estimates tab.
Probability and EV practice: 45 tasks · free, no sign-up
Probability and EV practice
Pick a task, read the scenario and answer each stage with a number. Fractions such as 255/256 and decimals are fine. Your typed answers are not sent or saved. We count only anonymous right and wrong totals per task.
8 of 45 tasks
C++ read and explain: 32 tasks · free, no sign-up
C++ read and explain
Read a short piece of C++ and answer the questions. The code is not compiled or run. Your picks are not sent or saved. We count only anonymous right and wrong totals per task.
8 of 32 tasks
Calibration and Fermi estimates: 70 questions · free, no sign-up
Calibration and Fermi estimates
For 5 questions, give a range you are 90% sure contains the true number. Answers are public facts or estimates you can work out, and every one comes with its sources. Your numbers are not sent or saved. We count only anonymous hit and miss totals per question.
Demo screens
Demo — sample dataSample data only. Not part of your practice.
Sat a quant OA? Report it and earn product credit at launch. Up to 3 accepted reports per person; we decide which reports are accepted; credit is applied when the product launches. This demo uses sample data only.