Make 24
Merge four cards two at a time and make the last one 24. Fractions are allowed.
Example
Example
Four cards on the table. Here 8 and 3 are picked, so an operation merges them.
Deals you can finish with plus and times alone. There is always more than one way through.
6 puzzles · The clock starts on your first move
- Solved
- 0 / 6
- Active time
- 0:00
Make the last card 24
Make 24 with four numbers: pick two cards, then pick an operation. The two cards merge into one card holding the result. Keep going until one card is left. A round is six deals, and you can skip any of them.
Play with the keyboard
Press 1, 2, 3 or 4 to pick the card in that place. Press it again to put the card back. Press plus, minus, star or slash to merge the two picked cards. The x key multiplies too. Press w to swap which of them is on the left. Press z or Backspace to take a step back. Press r to start the deal again. Press h for a hint. Press s to skip the deal. Press Escape or End to stop the round.
Read the cards as words
Steps in this deal
Explore the method
Start at 24 and ask what makes it. Try pairs of cards, then explore other groupings and fractions.
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is usedHelp
The 24 puzzle deals four cards, each holding a number from 1 to 13. Pick two of them and pick an operation. Those two cards merge into one card holding the result. Repeat until one card is left. The deal is solved when that last card is 24. Every deal can be done: those four numbers make 24 in at least one way.
For minus and divide the order matters. The card you pick first is on the left. The line under the cards says which is which, and Swap the order turns them round.
A divide that does not come out whole is kept exactly. 8 divided by 3 stays as 8 over 3, and the card shows it that way. Some deals can only be done through a fraction.
The level is the shape of the answers, not the size of the numbers. Easy deals can be finished with plus and times alone. Standard deals need a minus or a divide, but there is always a way through with no fraction. Challenge deals have only one answer, or need a fraction on the way.
A hint names two cards to merge first on one route to 24. Press it again on the same deal and it names the operation as well. Two hints a deal is the most it gives. A deal that had a hint still counts as solved if you finish it.
Show an answer writes out one route to 24 and ends the deal. That deal is marked shown. It never counts as solved.
The result is how many of the six deals you solved, with the deals you had shown or skipped, the hints you used and the time. A deal is solved only when you make 24 yourself. The clock starts on your first move and stops when the sixth deal is done.
The score says how this round went. It is not a speed record, and it says nothing about any other practice. A round you leave before the sixth deal is not saved.
The statistics page compares rounds at the same level. A round played with a hint, or with an answer shown, is saved and counted there. It is left out of the community comparison, because a round with help is not the same round.
24 is 3 times 8, 4 times 6, 2 times 12, 25 minus 1 and 48 over 2. Look for two cards that make one of those parts. Learn how to work back from 24
About this practice
The 24 math puzzle, on four numbered cards. Merge two at a time with plus, minus, times or divide, and make the last card 24.
Learn a method
Work back from 24Report a problem
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is used