Welcome to Zone 21 - Fast Math Solitaire, a brand new card game that offers the exciting opportunity to win real-world rewards and cash prizes (where available)!

In this game, your goal is to stay between 0 and 21 by strategically clearing cards from the table. The closer you can keep the target number to 21, the more points you will earn. Achieving an exact 21 is a jackpot and rewards you with great bonus points.

Zone 21 - Fast Math Solitaire offers a classic mathematical card game with some amazing twists. The gameplay is challenging and addictive, keeping you engaged and entertained for hours. The game also features multiplayer functionality, allowing you to compete against friends and solitaire players from around the world. Can you calculate the cards as quickly as possible and beat your opponents within the 3-minute time limit? Show off your skills and climb the leaderboard!

One of the most exciting aspects of Zone 21 - Fast Math Solitaire is the opportunity to earn prizes. Challenge players from around the world, put your skills to the test, and compete to win cash prizes (where allowed). The game is integrated with Skillz, a competition platform that offers leaderboards, trophies, physical or virtual prizes, and an incredible loyalty program that rewards you for playing.

Zone 21 - Fast Math Solitaire is a free game available on the iPhone platform. If you have any questions or proposals for the game, you can contact the developer at For inquiries about the Skillz system or cash tournaments, please reach out to