mathsprint.io is an online math game that tests your math skills in a contest of speed against live players.
It's simple. Play in quick 60-second games where you must solve as many simple arithmetic problems as possible. Whoever answered the most questions when time ends is the winner. Each game is given a fresh, random set of math problems every time. Don't worry, the problems may be random but everyone in your game will see the same ones in the same order.