Numday: Daily Math Challenge

Numday is a fast daily mental math challenge where everyone faces the same 7-step calculation chain. You have 90 seconds, one scored attempt each day, and a ranking that rewards speed and accuracy.

You can start without creating an account. After seeing your result, you decide whether to choose an alias, publish your score, and compare your position on the daily leaderboard.

Features:
• A shared daily math challenge
• 7 accumulated calculations per round
• 90 seconds to finish the challenge
• One scored attempt per day
• Practice mode for non-competitive rounds
• Score, time, and mistake tracking
• Daily global ranking
• Private Leagues to compete with friends
• Optional daily reminders

Numday is built for quick, focused sessions: solve the challenge, check your result, and come back for the next daily round.