Three tiers — easy (+ −, 1–50), medium (+ − ×, 3–15), hard (+ − × ÷, 3–30 with always-clean division). Type the answer, hit Enter, sprint your way through 60 seconds.
Best score is tracked locally per difficulty + duration combo, so 30s easy and 120s hard each have their own high score to chase.
Changes apply live — the embed link on the right and the preview above update instantly.
/embed.Embed link.