Arithmetica

Arithmetica is a one‑minute sprint of mental math. Equations appear quickly and you tap the correct answer; each fast, correct response adds a sliver of time, and misses waste precious seconds. It’s simple to start and ramps up as your pace increases. Played daily, it’s a tidy way to sharpen arithmetic in short sessions. The loop is honest—speed comes from accuracy—and the timer makes even basic problems feel engaging when you’re chasing a personal best.