MathTest21 drops you into a puzzle challenge you can start in a couple of seconds. Think math — that is the shape of it. It works the same on desktop, tablet and phone, and your progress picks up where the game left it.
About MathTest21
A new simple math app. Guess the result. Check your calculation skills with this simple app
How to play MathTest21
You can work the whole thing out by playing it. On desktop the arrow keys / WASD do the moving; the full mapping is in the table below. Portrait layout: hold the phone the way you normally do, or play it centred in the page on desktop. If a round goes badly, restart — attempts are cheap and it is usually the fastest way to improve.
Controls
| Input | Action |
|---|---|
| Mouse | Navigate menus and interact |
| Arrow keys / WASD | Move |
| Spacebar | Primary action |
On mobile: Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
Why it is worth playing
What makes MathTest21 stick is that failure is informative. You can usually name the mistake, and that is what makes another attempt tempting. A browser game does not need to be more than that.
At a glance
- Free to play with no account required
- Runs in the browser — nothing to download or install
- Portrait layout, comfortable one-handed on mobile
- Keyboard and mouse on desktop, full touch support on mobile.
- Math gameplay — Mental arithmetic that does not feel like homework
- Added to our catalogue from a 2022 release
Frequently asked questions
Is MathTest21 free to play?
It is free. There is no trial, no unlock and no sign-up wall on MathTest21 — the page you are on is the whole thing.
Do I need to download or install anything?
Nothing at all. MathTest21 runs in the browser tab you already have open, the same way a video or a map does.
Can I play MathTest21 on my phone?
Yes. Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
What are the controls for MathTest21?
Keyboard and mouse on desktop, full touch support on mobile. Mouse — navigate menus and interact; Arrow keys / WASD — move; Spacebar — primary action.
Can I play MathTest21 fullscreen?
There is a fullscreen control in the top-right of the player. Press Escape when you want the page back.
What kind of game is MathTest21?
MathTest21 is a puzzle game built around math. If that is the sort of thing you enjoy, the related games further down the page are picked using the same tags.
