Crossnum
A daily math crossword, where arithmetic is the clue to solving the puzzle.
Original Phone-friendly61 plays
Free math games you can play in your browser
The most played math games on Foundplay right now are Crossnum, Sudoku Roguelike and PikoMochi. All 9 here are free and play in your browser with no download, and 3 of them work on a phone.
9 games · Updated October 15, 2026 · Most played first
Math games turn numbers into play: crosswords solved with arithmetic, merge puzzles that combine equal numbers, sudoku with a twist, and card battles where sums do the damage. Some are made for kids to practice arithmetic, others are puzzles for adults that happen to use numbers. They are a good fit for short sessions and for anyone who likes a clean puzzle with one right answer.
Foundplay lists 9 math games, every one an original game that its creator hosts on their own site, so Play takes you straight to them. After Crossnum, Sudoku Roguelike and PikoMochi, the most played are 2048, Sufuku and Number Gacha. The newest ones are Sufuku and Math Marsh. Of these 9, 3 work on a phone. New games come out on Foundplay at 6 AM and 6 PM Pacific, and any that fit this tag join this page. The list below is sorted by plays and changes as people play.
Sudoku Roguelike
Sudoku mixed with roguelike card building
Original4 plays
PikoMochi
Squishy jelly merge puzzle. Fling mochis, merge equal numbers, climb the world ranking.
Original Phone-friendly4 plays
2048
Slide tiles and merge them to reach 2048
Original4 plays
Sufuku
Sudoku, but numbers repeat
Original Phone-friendly2 plays
Number Gacha
Roll numbers, open packs and fill the whole grid
Original1 play
Math Marsh
Swamp math game with frogs: practice arithmetic
Original0 plays
Math Tornado
Fast math card game for kids and families
Original0 plays
MathCardCaster Demo
Math card spell-casting battler demo
Original0 plays
Questions
- What are the most popular math games?
- By plays on Foundplay: Crossnum, Sudoku Roguelike, PikoMochi, 2048 and Sufuku. The list on this page is sorted most played first.
- Which math games work on phones?
- 3 of the 9 are marked as playable on a phone, including Crossnum, PikoMochi and Sufuku. Each game's page says whether it works on a phone or needs a keyboard.
- Are these games free?
- Yes. Every game on Foundplay is free to play in a web browser, with nothing to download. Play opens the game on its creator's own site; some creators offer optional extras there.
- Are there math games for kids here?
- Yes, a few are made for practicing arithmetic, with simple rules and friendly art. Others are number puzzles for any age. On Foundplay: Math Marsh and Math Tornado.