Make 24: the four-number puzzle
Use all four numbers once each, with adding, subtracting, multiplying and dividing, to land on exactly 24. Tap a number, tap an operation, tap another number. Every deal below is checked by a solver first, so there is always an answer.
How to get better at 24
Most deals fall to one of three shapes. Look for a pair that makes a factor of 24 (2, 3, 4, 6, 8 or 12) and a second pair that makes its partner. Next, try to reach 24 one step early: 23 plus one, 25 minus one, or 12 doubled. If neither works, the deal usually needs a fraction, like 8 ÷ (3 − 8 ÷ 3), which is why the "Needs fractions" setting exists.
Counting how often a number appears helps too. Two 6s almost always means 6 × 4 or 6 + 6 + 12. A 1 is a free multiplier you can spend anywhere.
Sumbriska is a calm island puzzle built on the same pleasure: moving numbers around until every sum lands exactly. Daily board, hints that never cost you anything.
Free on the App StoreQuestions
What are the rules of the 24 game?
You get four numbers and must use each exactly once, combining them with addition, subtraction, multiplication and division, in any order and with any grouping, to reach exactly 24.
Is every deal solvable?
Yes. Each deal here is generated and then checked by a solver that tries every order, operation and grouping, and only solvable sets are shown. The Hint button reveals one solution.
What does "Needs fractions" mean?
Those deals have no solution using whole numbers along the way. You have to pass through a fraction, for example 3 ÷ 8 or 8 ÷ 3, before reaching 24. They are the hardest sets.
Is there an app version?
This page is a free stand-alone game. If you enjoy moving numbers until a total lands exactly, Sumbriska is our iPhone island sum puzzle with a daily board and free hints.
- Play Reach the NumberA free daily math puzzle: combine four numbers with + − × ÷ to hit the target, like the 24 game. One shared puzzle a day plus endless mode, undo, hints and a streak. No sign-up.
- Free daily number puzzle (play online)A free daily number puzzle to play in your browser: flip bridges so every island hits its target sum. New board every day, solution behind a tap.
- Bridge-Sum Puzzle Maker: Create and Share an Island ChallengeChoose four island targets, test every bridge orientation and share your own playable number puzzle. Recipients get a fresh unsolved board.