Mental math game for speed, accuracy, and drills.
Practice on the go and get faster every day with quick rounds, times tables, division, subtraction, and more.
Drills
How to play
SumNinja is a fun math game that tests your math skills! The goal is to solve problems as fast as you can. The more you play, the harder it gets. But be careful—if you make a mistake, it's GAME OVER. Good luck!
- Focus on the challenge shown above the input line.
- Type the correct answer. The timer line under the input shows how much time you have left.
- Keep your streak alive to unlock achievements and increase your score.
Stats
Suggested next drill
Challenge summary
Daily, weekly, and monthly progress at a glance.
Complete more challenges to unlock deeper speed insights.
Practice calendar
Last 52 weeksAnswer time trends
Streak progress
Training history
Play a round to start your history.
Round details
Select a round to view detailed results.
Achievements Dojo
Unlock badges by keeping your streak alive!
Progress
Unlocked 0 of 0 Achievements
What's New
Short, fun stories behind every tweak.
You're all caught up!
No updates yet.
Command Center
Game mode
Choose whether the round ends on time or only on a wrong digit.
Practice focus
Choose how the challenge mix rotates.
Toggle the combos you want SumNinja to cycle through.
Digit groups
{{ focusHelperText }}
{{ focusOperatorHelperText }}
{{ focusNumberHelperText }}
{{ focusDigitsHelperText }}
Timing window
Tune the countdown that powers each round.
Smart pacing
Let SumNinja respond to your streaks and slow spells.
Language
Choose the language used across SumNinja.
Updates
Choose how SumNinja shares its latest tricks.
{{ profileModalCopy.title }}
{{ profileModalCopy.message }}