Zap N cognitive suite
Practice balloon risk, N back memory, rule shift reaction, and market making games.
Four measured cognitive tasks · no signup
Start free practiceNo account. No card. Your first run starts here.
Space pumps ten cents into the balloon. Enter banks the temporary value. A pop loses the current balloon.
Traintheoperationthatcostsyoupointsbeforetheclockexposesitagain.
Preparation guide
Practice in one uninterrupted block and use the same keyboard controls you will use on test day. Speed improves when answer entry becomes automatic.
Review both accuracy and response time. A slow correct answer can still reveal the operation family that will cap your score under a fixed deadline.
Repeat weak families separately, then return to a full mixed benchmark. This keeps technique work distinct from pacing practice.
Answers before signup
This suite includes a balloon risk task, spatial and numerical N back, rule shift Stroop, and a five card market making game.
Each task reports its own behavioral metrics, including risk calibration, d prime, false alarms, reaction time, and trading PnL.
The hiring firm does not publish a stable universal cutoff. Use accuracy, pacing, and repeatable improvement rather than an unsupported single threshold.
Yes. The embedded trainer starts immediately and stores completed guest runs in this browser.
Separate calculation errors from slow correct answers, then drill the slowest domain and question shape before repeating a full benchmark.
Yes. Multiple choice drills support number keys and A, S, D, F. Typed drills accept exact decimals and fractions.
Keep question-level timing locally and expose the family slowing you down.