SELECT PUZZLE TYPE AND DIFFICULTY
KENKEN for your Mobile
Fun, addicting, yet educational. The KenKen iPhone/iPad app is perfect for the whole family!
KENKEN in the Classroom
Calling all educators! Join our FREE program to use KenKen puzzles with your students.
Follow the Leaderboard
Join the leaderboard by subscribing with us! Solve puzzles without using any hints.
Rules For Playing KenKen®
The numbers you use in a KenKen puzzle depend on the size of the grid you choose. A 3 x 3 grid (3 squares across, 3 squares down) means you use the numbers 1, 2, and 3. In a 4 x 4 grid, use numbers 1 to 4. A 5x5 grid requires you use the numbers 1 to 5, and so on.
The numbers in each heavily outlined set of squares, called cages, must combine (in any order) to produce the target number in the top corner using the mathematic operation indicated (+, -, ×, ÷).
Here's how you play:
- Use each number only once per row, once per column.
- Cages with just one square should be filled in with the target number in the top corner.
- A number can be repeated within a cage as long as it is not in the same row or column.
- To start, click on any square. A "number ring" appears with that grid's possible numbers. These numbers will also show up on the left side above the grid as the "Notes" box.
- Ready to fill a number in that square? Just click the one you want in the number ring. It will then appear in the middle of the square.
- Narrowed it down to a couple of numbers but still not totally sure? Click the numbers you want from the Notes box. They'll show up smaller in the square.
Hints: Also in the candidates bar are
, 
:
- Clicking will place all possible Notes in the square.
- Clicking will get rid of all the Notes in the square.
- If you'd like to repeat a note (notes) in another square, simply drag the number from the original square to the new one.
- Clicking
- When you've ruled out one of your notes, click on it again in the Notes box. The number will disappear from the square.
- When you fill in a number in a square (by selecting from the number ring), any notes in that square will disappear.
- Changed your mind about a number? In the number ring, click the red eraser icon to clear the square.
- To hide the number ring, click the red "X."
JOIN US
CONTACT US
General questions & Concerns: customercare@kenken.com
KENKEN Classroom Program:
classroom@kenken.com
Licensing:
rights@kenken.com
International inquiries:
international@kenken.com
Welcome to KENKEN!
No matter what you're looking for — learning or fun — KenKen.com has it! Free online puzzles. Cool math games. Number games. (More addictive than Sudoku or Kakuro? You decide!) Educational games for kids. Visit our For Teachers section for math teacher resources, our free KenKen Classroom program, and a message from Tetsuya Miyamoto, the Japanese educator behind KenKen. Miyamoto, chess master David Levy, and the rest of Team KenKen have crafted these math puzzles into great games for learning and brain training. Need even more KenKen? Check out our Will Shortz Presents books. Try our mobile app on iPhone and iPad or our Kindle version. Play on the New York Times puzzle page and NCTM website. Regardless of why, how, or where you play, KenKen are the math puzzles that make you smarter!
Sincerely,
Team KenKen