BrainPlayQuick Math
Rapid-fire arithmetic — answer as many as you can in 60 seconds.
Sudoku
Classic 9×9 sudoku with easy, medium and hard boards plus pencil notes.
Sudoku — FAQ
Is Sudoku free to play?
Yes — Sudoku is completely free on BrainPlay. It runs in your browser with no download, no sign-up and no paywall.
Can I play Sudoku on my phone?
Yes. Sudoku is touch-optimized and works on phones, tablets and desktops. Your best results are saved automatically on your device.
What skills does Sudoku train?
Sudoku primarily exercises mental arithmetic and number sense. Short daily sessions are the most effective way to improve.