About Cards 21
Test your strategy and math skills in Cards 21! Arrange cards across four columns to hit the perfect sum of 21 without exceeding five cards per stack. It is a challenging, brain-teasing twist on classic card games that is easy to learn but hard to master. Play now and see if you can keep your lives and conquer the board!

- Game Title: Cards 21
- Category: Card & Board
Controls
- Drag and drop cards to place them in the columns