Free online math battle game

Quick thinking.Big victories.

The multiplayer math game that makes every second count. Challenge a friend, race an AI opponent or sharpen your mental math in a quick solo sprint.

Play free now How it works
✓ No download needed✓ 30–90 second rounds✓ Easy to hard
Pick your challenge

One game. Four ways to win.

From a quick mental-math warm-up to a real-time showdown, NUMO DUEL gives every player a way to join in.

Real-time multiplayer

Meet another player in a head-to-head math match. Both players see the same questions and race for the highest score.

Challenge friends

Create a private match, share a six-character code and settle who's the quickest thinker.

Battle AI

Play against a computer opponent when you're on your own. Adjust the challenge to your comfort level.

Solo Sprint

Set a timer, answer as many problems as you can and aim for a new personal best.

Player rankings

Explore verified online-match leaderboards for games played, wins, total points and win rate.

Your own avatar

Choose an illustrated character or turn a photo into a playful cartoon-style avatar with the in-game editor.

Three simple steps

Ready. Solve. Celebrate.

01.

Choose a game mode

Practice solo, challenge AI, find a real rival or invite a friend with a private room code.

02.

Set your difficulty

Choose Easy, Medium or Hard and a round length of 30, 60 or 90 seconds.

03.

Think fast and score

Answer math problems before the timer runs out. Correct answers score points and mistakes cost hearts.

Helpful answers

Frequently asked questions

Is NUMO DUEL free to play?

Yes. You can open the browser game and play AI or solo challenges without a payment. Online play requires a connection to the game server.

Can I play a math game online with friends?

Yes. In Play with Friends, one player creates a private game and shares the six-character room code with the other player. Both devices must be online.

Which math skills can I practice?

NUMO DUEL includes addition, subtraction, multiplication and division. Select a difficulty and choose which operations appear in your rounds.

Can I play NUMO DUEL on a phone?

Yes. The game is mobile-friendly and has a progressive web app version. Native mobile builds require separate distribution through the app stores.

How do the leaderboards work?

Online multiplayer results are verified by the game server. Explore top players by total matches, wins, scores or win rate, for all time or the last seven days. Local AI and solo results stay in your local profile.

What is a Knockout Cup?

Eight players join a cup and play 30-second duels in knockout rounds until one player is left. Computer opponents fill any open seats, so a cup always starts within half a minute. Cups with two or more real players count towards the champions board.