Solve 20 problems as fast as you can. Test your speed and accuracy!

No timer or limits — just solve problems and rack up a high score.

You have 60 seconds to solve as many problems as possible. Time starts now!

Start with 10 seconds. +3.5 seconds for each correct answer. How long can you last?

Only multiplication problems. Perfect for practicing the times tables!

Solve ax² + bx + c = 0 with integer roots. Enter both answers!

A new expression appears every 5 seconds. After 10 rounds, enter the final answer!