Accumulated mental math
The prompt shows the full current operation, such as 56 + 24. When you answer correctly, that answer becomes the current value for the next calculation.
Daily math challenge
Daily math challenge app for Android
Numday is a short daily mental math challenge: solve a shared chain of 7 calculations in 90 seconds, see your score, then choose whether to publish it and compare in rankings.
One challengeEveryone receives the same current challenge during the daily window.
7 calculationsEach correct answer becomes the starting value for the next operation.
Play firstYou can try the challenge before creating an account.
What is a daily math challenge?
A daily math challenge is a short mental calculation game built around one shared task per day. Instead of endless worksheets or random drills, Numday gives every player the same 7-step calculation chain so scores can be compared fairly within the same challenge window.
The game focuses on speed, accuracy, and a clean routine: open the app, start today's challenge, solve the chain, review your result, and return tomorrow for a new challenge.
Who Numday is for
Numday is designed for people who want a quick mental math workout with a competitive hook: students warming up, adults keeping arithmetic sharp, puzzle fans, and friends who like comparing a shared daily result.
How Numday works
90-second sprint
The current challenge is timed. You have 90 seconds to finish the 7 calculations, and your completion time strongly affects the final score.
Score after playing
Numday shows your score, time, and wrong-answer count after the challenge. You only need to sign in if you want to publish the score or enter rankings.
Daily rankings and leagues
After finishing the current challenge, you can compare your published score globally or inside private leagues with friends.
Get Numday on Android
Install Numday and start today's 90-second daily math challenge. You can play before creating an account.
Get Numday on Google Play