Published by CodeCube Brothers Partnership on 2023-05-20
What is Zone 21?
Zone 21 - Fast Math Solitaire is a new mathematics game that offers real-world rewards and cash prizes (where available). The game involves removing cards from the board and trying to stay between 0 and 21. The target number should be kept close to 21 for more points, and exactly 21 will give the best points. The game has classic solitaire card game features with some amazing twists. Players can play for free as long as they want without constantly sitting through ads. The game also has multiplayer features where players can play against friends and solitaire around the world. Players can earn prizes by challenging people from around the world and competing to win cash prizes.
1. • Calculate cards as quick as you can! You have 3 minutes to beat your opponent.
2. • Ready for the challenge? Try to hit the target number 21 and get the great bonuses.
3. Remove the cards from the board and try to stay between 0 and 21.
4. Keep the target number close to 21 for more points.
5. • Clear the cards from table and stay between 0 and 21.
6. • Play for free as long as you want without constantly sitting through ads.
7. Exactly 21 will give you best points.
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GET Compatible PC App
| App | Download | Rating | Maker |
|---|---|---|---|
 Zone 21 |
Get App ↲ | 23 4.83 |
CodeCube Brothers Partnership |
Or follow the guide below to use on PC:
Select Windows version:
Install Zone 21 - Fast Math Solitaire app on your Windows in 4 steps below:
Download a Compatible APK for PC
| Download | Developer | Rating | Current version |
|---|---|---|---|
| Get APK for PC → | CodeCube Brothers Partnership | 4.83 | 1.1.5 |
For Windows 11, check if there's a native Zone 21 Windows app here » ». If none, follow the steps below:
| Minimum requirements | Recommended |
|---|---|
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Get Zone 21 on Apple macOS
| Download | Developer | Reviews | Rating |
|---|---|---|---|
| Get Free on Mac | CodeCube Brothers Partnership | 23 | 4.83 |
Download on Android: Download Android
- Classic solitaire card game with some amazing twists
- Clear the cards from the table and stay between 0 and 21
- Try to hit the target number 21 and get great bonuses
- Play for free as long as you want without constantly sitting through ads
- Multiplayer features where players can play against friends and solitaire around the world
- Players have 3 minutes to beat their opponent by calculating cards as quickly as possible
- Win and show off scores on the leaderboard
- Players can earn prizes by challenging people from around the world and competing to win cash prizes
- Cash rewards for top scorers (where allowed)
- Available for download to test calculating skills today
- Support available for any questions or proposals to the game at support@ccbrothers.com
- Support available for any questions about the Skillz system or cash tournaments at support@skillz.com
PC Apps 
