Zone 21 - Fast Math Solitaire 17+

Clash Real Money & Cash Prizes

CodeCube Brothers Partnership

    • 4.9 • 22 Ratings
    • Free



Welcome to Zone 21 - Fast Math Solitaire a brand new card game where you can win real-world rewards and cash prizes (where available)!

Try to stay between 0 and 21. It's not easy and tries to keep the target number close to 21 to earn more points!

It's a jackpot when you get exactly 21 and earn great bonus points.

• Classic mathematical card game with some amazing twists!
• Clear the cards from the table and stay between 0 and 21.
• Ready for the challenge? Try to hit the target number 21 and get great bonuses.

• Play against friends and solitaire around the world!
• Calculate cards as quickly as you can! You have 3 minutes to beat your opponent.
• Win and show off your scores on the leaderboard!

• Challenge people from around the world
• Put your skills to the test and compete to win cash prizes!
• Cash rewards for top scorers (where allowed)!

Challenge people around the world with Skillz, a competition platform complete with leaderboards, trophies, physical or virtual prizes, and an amazing loyalty program that rewards you for playing!

If you have any questions or proposals for the game, we hope you contact us at
If you have any questions about the Skillz system or cash tournaments please contact:

What’s New

Version 1.1.5

• bug fixes

Ratings and Reviews

4.9 out of 5
22 Ratings

22 Ratings

Art Tartery ,

WHEN THE CASH GAMES COME¿?The best game of SKILLZ - cannot wait to play cash...

All games by this company have great action, music, outlook, and they are good to improve your intellect. PLEASE INFORM ME WHEN CASH TOURNAMENTS ARE AVAILABLE!!!!!!!!!! The first time I do play a game without an ability to participate IN CASH TOURNAMENTS! You got me. Extra class! You are the smartest creators on the market.

Ang-i ,

Big boy

Super great games, creators and staff. They always respond in a matter of minutes and they take care of you well.

Big mom 2.0 ,


It’s a good game will be better

App Privacy

The developer, CodeCube Brothers Partnership, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Location
  • Identifiers
  • Usage Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Financial Info
  • Location
  • Contact Info
  • Contacts
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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