Card game for kids: Math card game free online for the classroom or home. Math Solitaire on PC and mobile for 4th, 5th, 6th grade, elementary school students, middle school...
Learn4good games logo

Math Solitaire Zero21

Rating: 4.9/10 - 9 votes

Solitaire Zero21 - How quickly can you solve basic math sums in your head? Play as one player in this straight-forward, challenging and addicting math card game for kids, teens and adults too. The history of this Solitaire game began with traditional Solitaire where you first remove all Jokers from the 54 cards and then you are given 4 random cards from the remaining 50 cards. In this version of the Math Solitaire game, you must get rid of all the cards and avoid reaching 21, using the addition and subtraction rules on the cards themselves!

The aim of the game is to use all of the cards but not exceed, or reach, 21. Use your mathematical knowledge to make sure you dont reach those heights with your numbers. Simple addition and subtraction is all that is required but do not take it too easy. This requires concentration as one wrong move can throw you off course. Play the cards strategically so you dont over shoot and end up with 21! Good luck!

How to Play: First of all pick your country out of the options then you are ready to start! Avoid getting to and above 21 in this game of solitaire. You must use your mouse to click on the deck of cards and then get them do disappear as you take one card at a time. The cards have a number on and either a plus or a minus which relates to how that card will affect the overall score. Once you use all of the cards, the game will restart with a fresh deck of cards. Enjoy!

This HTML5 based game works on mobile devices and PC/Mac browsers.

Before you submit an error report, please review these common issues & solutions:

  • Notice: If the game isn't loading, please have your network administrator allow content from external sites to be iframed within Learn4Good.com.
  • Ask for help on Learn4Good Games Discord Channel
  • Note: If the game is taking a while to load, please press Ctrl and F5 buttons on your keyboard at the same time to refresh the page without local cache. If some advertisements get stuck - try to reload the page once or twice.
  • Try using a VPN or Proxy service in case you are having a problem with Blocking or Connection Reset or see that Game does Not Load properly.
  • If you see a GAME BLOCKED message or if a game does NOT LOAD in 3-5 minutes even after page refresh - this is not blocked by us. Please speak to school/office administration or your network provider. They are blocking it.
  • If the game DOES not FIT the screen (part of the game area is below above the browser) - see the GO FULL SCREEN button just at the right above the game. This should solve it.
  • Make sure that Javascript is Enabled in your device browser.
  • You may only see a blank screen / or no game screen at all if advertisements are in any way restricted on your browser.
  • Make sure that No Ad Blocker is enabled on your browser (Many game developers only income source is through ads, so they don't make the games available if ads are blocked).
  • Even if your Ad Blocking software is disabled, it may cause an issue with loading an HTML5-based game.
  • You need a High Speed internet connection because some games use large files which take a minute or two to load for the first time.
  • Some games require you to tap/click on the game screen area when they load in order to start.
  • Playing on a different device or browser (with different settings) can often solve the issue.
  • Games are not available in all jurisdictions outside of the USA.

Your Email (Optional):
Problem description:*
Attach a screenshot or an image (up to 12MB) (Optional):

Please wait while we process your submission...

You are now following Learn4Good Games News.
Top Games
Top Games by Country