Quant OA preparation
Build speed that survives the penalty clock.
Realistic mental math, sequence, probability, and cognitive assessment practice with question-level response telemetry.
Start free two minute sprintNo signup required. Unlimited classic integer runs.
Ready
Think fast. Answer cleanly.
Use the keyboard for every action. Your response time is measured with performance.now().
Enter to start · Esc to restart
Traintheoperationthatcostsyoupointsbeforetheclockexposesitagain.
Choose your target
Firm specific pressure, not generic worksheets.
Optiver 80 in 8
Free Optiver 80 in 8 Practice Test (Realistic +1/−1 Simulator)
80 questions · 480 seconds · +1 correct · −1 wrong
Zap N cognitive suite
Optiver Zap N Cognitive Games Practice
Four measured cognitive tasks · no signup
Optiver number logic
Optiver Number Logic Test Simulator (26 Sequences, +1/−1)
26 sequences · six pattern families
IMC 24 in 18
IMC Trading 24 in 18 Number Sequences Practice Test
24 sequences · 18 minutes · typed entry
Flow Traders math test
Flow Traders Mental Math and Sequence Sprint Simulator
75 questions · 480 seconds · comma decimals
SIG quantitative assessment
SIG Quantitative and Probability EV Practice Test
17 probability questions · exact answers
Jane Street interview practice
Jane Street Market Making, Estimation and Card EV Trainer
Five card EV · four reveal rounds · live PnL
Akuna Capital OA
Akuna Capital Mental Math and Sequences OA Trainer
Arithmetic and probability mixed practice
Maven Securities OA
Maven Securities 50 in 5 Speed Mental Math Simulator
50 questions · 300 seconds · typed entry
Five Rings quant OA
Five Rings Capital Mental Math and Combinatorics Sprint
20 questions · 20 minutes
Citadel math drill
Citadel and Citadel Securities Rapid Probability and Mental Math
Mental math and probability in one set
D. E. Shaw quant prep
D. E. Shaw Quantitative Brainteaser and Expected Value Trainer
Dice · cards · urns · coin streaks
Two Sigma quant OA
Two Sigma Quantitative Research Speed Math and Stats Drill
Two minute speed benchmark · typed input
WorldQuant pattern drill
WorldQuant Quantitative Speed and Pattern Recognition Drill
Six generated sequence families
Mental math techniques
Learn the shortcut, then test it under time.
Mental math technique
Multiply Numbers Near 100 Fast
Learn and drill the base 100 multiplication shortcut.
Mental math technique
Square Two Digit Numbers Fast
Practice symmetric offsets for rapid two digit squares.
Recall table
Fraction to Decimal Flashcards for Quant Tests
Build instant recall for common sixths, eighths, twelfths, and sixteenths.
Mental math technique
Divide by 5 Fast in Your Head
Double then divide by ten with a focused timed drill.
Mental math technique
Calculate Percent Change Fast
Practice reference value selection and exact decimal shifts.
Mental math technique
Estimate Square Roots Mentally
Use nearby perfect squares to estimate roots quickly.
Start with the eight minute benchmark.
See the score, percentile estimate, and weakest family after the run.