NumberDay: Math 24

One math puzzle a day. Five thousand more whenever you want. NumberDay is a daily brain puzzle built around the classic Math 24 game. Every day, you get a new puzzle: four number cards and a target. Use +, −, ×, ÷, and parentheses to make every card add up to the target, exactly once each. It takes 30 seconds. Or two minutes on a tough one. Either way, you'll start your day a little sharper. DAILY MODE • A fresh puzzle every day at midnight (KST) • Difficulty escalates through the week — easy weekdays, "weekend boss" on Saturday and Sunday • Track your current streak, longest streak, and total solves • Share your result as a friend-friendly card (date, target, cards, time, attempts, stars) • Zero ads. Daily mode stays clean PRACTICE MODE • 5,000 curated puzzles — never run out • Cycle through at your own pace • Brief interstitial ads support development CLEAN, FOCUSED DESIGN • Pastel four-color cards inspired by NYT Connections • Warm cream background, coral accent • No accounts, no signups, no notifications begging you to come back • Plays in every language — numbers are universal WHY MATH 24? The 24 game has been a staple of math classrooms for half a century because it trains arithmetic, parenthesization, and reverse search in a tight, addictive loop. NumberDay packages it as a daily ritual — like Wordle, but with numbers. PRIVACY We don't collect your name, email, or account. Daily streak data stays on your device. The only third party we use is Google AdMob, and only in Practice mode. Full policy in-app. — DY Studio · Vancouver, BC