24 Game Cards — Free Printable PDF Cards & Answer Keys

What's Included in Every Set

• 40 printable cards per set, four numbers on each card
• Three difficulty levels: Easy, Medium and Hard
• A complete answer key for every card in the set
• Both A4 and US Letter PDF versions
• Black-and-white layouts, no coloured ink needed
• Blank card templates for writing your own numbers

Each set is two PDFs: one for the puzzles, one for the answer key. Cards are laid out four to a page, so a single cut down the middle and across separates them. Semantic filenames make every download clear: math24solver.com-24-game-cards-easy-set-1.pdf and math24solver.com-24-game-cards-easy-set-1-answers.pdf.

How to Play with These Cards

1. Print a set. Open the PDF and print at 100% scale. Do not use "fit to page", or the cards will come out at different sizes. Plain paper works; 160 gsm card stock lasts longer if you are reusing them.
2. Cut the sheets. Four cards per page. One cut vertically and one horizontally gives you all four.
3. Deal one card per group. Each card is a self-contained puzzle: four numbers, one target.
4. Set the rules. Use all four numbers exactly once. Only +, -, x and / are allowed, with brackets if you need them. Every number must be used, and no number may be repeated.
5. Time it. Beginners get three minutes per card. Once a group is comfortable, drop to 60 seconds, which is how the game is usually played competitively.
6. Check with the answer key. Mark correct answers, then let groups compare methods. Different solutions to the same card are common and worth a bonus point.
7. Scale to a class. Print one set per four students. For a warm-up, put a single card on the board and have the whole room work it in silence for one minute.

A worked example. Take the card 4, 6, 2, 3. One solution is 4 x 6 x (3 - 2) = 24. The 3 and 2 build a 1, which leaves the 4 and 6 to do the work. This "make a 1" trick is the single most useful habit for new players.

Difficulty Levels Explained

Sets are graded by how hidden the route to 24 is, not by how big the numbers are.

Easy - a multiplication or addition path is visible almost immediately, and no fractions or negative intermediate results are needed. Cards such as 1, 2, 3, 4 (1 x 2 x 3 x 4) and 2, 3, 4, 4 ((4 - 2) x 4 x 3) belong here.

Medium - the numbers need rearranging, and at least one intermediate step produces a fraction or a negative number. Cards such as 1, 4, 5, 6, solved by 6 / (5 / 4 - 1), sit here.

Hard - the solution depends on an intermediate fraction that most players never consider. 3, 3, 8, 8 uses 8 / (3 - 8 / 3), and 1, 3, 4, 6 uses 6 / (1 - 3 / 4). Every card set lists its level, so you can hand out the right one without testing every puzzle first.

Make Your Own 24 Game Cards

Need a specific set of numbers? Use the card maker above to generate instant solutions, including fraction and negative routes, then export the whole set as a printable PDF with its own answer key.

Teachers use this to build a deck around number bonds to ten, multiplication tables up to 12, or a fresh set of hard cards once the printed ones have been memorised. Choose how many cards go on a page, from six small cards for a warm-up to two large ones for a group working at a table. Every generated set uses the same layout as the downloadable cards.

Need to check a hand first? Use the 24 game solver, then return to the generator to make a matching printable set.

Classroom and Homeschool Ideas

Timed relay. Split the class into teams. Each team gets one card, solves it, and passes the deck along. First team through five cards wins, keeping every student busy.

Bell-ringer warm-up. Put one card on the board at the start of a lesson. Students write their solution on a slip and hand it in, a two-minute routine that builds number fluency week by week.

Differentiated stations. Put the Easy set at one table and the Hard set at another. Students choose their level without having to advertise which one they picked.

Maths centre rotation. Print and laminate a set and its answer key so students can self-check without asking. For homeschool pacing, one card a day gives 40 days of practice from a single set. On family game night, deal one card to each player; the player holding the most correct cards at the end wins.

How to Use the Answer Keys

Every set has its own answer key in a separate PDF, so you can print the puzzles without printing the solutions.

The keys list one correct solution per card. They are not exhaustive: most cards have several valid routes to 24, and any correct route counts. If a student offers a method that is not printed, check it step by step rather than marking it wrong.

Cards marked "no solution" genuinely cannot be solved using each number once with +, -, x and /. Working out that a card has no solution is a valuable exercise in itself.