Sixty-second games for mental arithmetic, estimation and probability. Every run has a seed, so you can hand somebody the exact questions you played and find out who is faster.
Edmund Michalski
Runtime, design system, daily
Cameron Jiang
Generators and verification
Pick the larger of two expressions before you could finish working out either one. You get sixty seconds, and every wrong answer takes two of them away.
Arrow keys or A / D. Space to start.
7 in Comp for arithmetic and recall. 5 in Poker Lab, where the same probability is attached to a decision. 1 in Consulting, where the question is too big to answer until you break it up.