THE RULES
Read the statement and choose the replacement for the highlighted mistake. You have 10 seconds per question.
Correct: +100 × question number.Wrong or timeout: −50 × question number.Correct answers add 10 points per second remaining, rounded down to whole points.
The clock keeps running if you leave the tab. Scores can go below zero. Your first daily result is saved on the server for this browser. The daily round changes at midnight Eastern.