Eureka: Brain Math Puzzle

How sharp is your mind — really? Not "are you good at maths". Sharp. Fast, precise, adaptable under pressure. Most people have never had an honest answer. Eureka gives you one, and then gives you something better: a way to make it climb. Take the 90-second test. You'll get a number. THE NUMBER Your Sharpness is a single lifetime rating, from 200 to 2000. It is not a score, and it is not how much you've played. It's a measure of how well you think under a clock — and it moves after every rated run. Eight bands stand between you and the top: Explorer → Thinker → Scholar → Professor → Inventor → Newton → Tesla → EINSTEIN Most players never see the last two. That's the point. HOW YOU CLIMB Each run gives you a score out of 1,000 — that run, and that run only. Your Sharpness is the bigger story underneath it. Here's the rule that makes it honest: harder difficulties can lift your rating higher, and a run below your level can NEVER lower it. Easy tops out. Medium takes you further. Only Hard and Expert reach the highest bands. So you can play relaxed without risk — but you cannot bluff your way up. The rating has to be earned. THE GAME ITSELF Merge numbers with + − × ÷ to hit a target exactly. Every number used once. Sixty seconds. Ten puzzles a run. Simple enough to learn in one screen. Hard enough that "Einstein" means something. RANKED BY BRAINS, NOT BY LUCK Three leaderboards, each answering a different question: ⭐ RATING — who is genuinely sharpest, right now 📅 DAILY — one shared puzzle set, the same for everyone on Earth, every day 🏆 BEST RUN — the all-time hall of fame for single-run scores Filter any of them from worldwide down to your own city, or to just your friends. And if you're ranked #412, you'll see #412 — not an empty screen. EVERY DAY, SIXTY SECONDS • DAILY CHALLENGE — identical puzzles worldwide, one ranked attempt, then replay untimed as much as you like • STREAKS — milestone rewards, and freezes so one busy day doesn't erase a month of work • LIVE SHOWDOWNS — twice-daily events where you race the world in real time • FRIEND DUELS — send a link, your friend plays your exact puzzles • JOURNEY — a levelled campaign to sharpen up on your own terms MADE TO BE PLAYED DAILY Sixty-second puzzles fit any coffee break. Works offline. No sign-up needed. Five themes. No clutter, no noise, no nonsense. Whether you're keeping mental arithmetic sharp for exams, want something smarter than doomscrolling, or just need to know where you actually stand — find out. Take the test. Find your genius.