Synthesis24
Four numbers. Make 24.
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Free
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About
Four numbers. One target: 24.
Use addition, subtraction, multiplication and division to turn four number cards into 24. Use each starting number once, and combine intermediate results as you work toward the answer.
Drag numbers and operation symbols into place to build your calculation.
Choose how to play:
- Levels: solve puzzles and unlock the next level.
- Endless mode: solve a puzzle, then try a new set of numbers.
The refreshed home screen brings updated graphics, rounded buttons and icons to the same number puzzle.
Explore 800 levels, with easier puzzles between challenges.
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What's New in Synthesis24
1.1.13
October 27, 2026
Refreshed game screens, buttons and icons. Updated result dialogs with clearer Next Level and Play Again prompts. Improved text wrapping across languages. Expanded to 800 levels with a gentler difficulty rhythm. Improved level-list loading and scrolling.
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