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What is KENKEN?


It’s not a crossword. It’s not some extreme version of tic-tac-toe. Simply put, it’s a grid-based numerical puzzle that uses the basic math operations—addition, subtraction, multiplication, and division—while also challenging your logic and problem-solving skills. By altering the size of a KENKEN grid, from 3x3 up to 9x9, and employing different combinations of math operations, five different difficulty levels can be generated, and a seemingly endless number of puzzles. (And many players seem determined to try them all!) In a way, KENKEN is like a game of pool or even chess: The more you think ahead to your next move and consider all the possible outcomes, the better you’ll get—and the smarter you’ll become!

KenKen was developed in 2004, not two guys named Ken...but by acclaimed Japanese mathematics educator Tetsuya Miyamoto. His goal was to improve his students’ math and logic skills...and what better way than using a super cool puzzle? So he developed one that would be fun and challenging for anyone at any level. Most importantly, he wanted to encourage independent thinking, logic, reasoning, concentration, and perseverance. His puzzles immediately met with unbelievable success.


So KENKEN was born in the classroom. But the puzzle was too addictive to stay in school alone. It quickly became an international phenomenon for people of all ages. KenKen was the first daily feature since the crossword puzzle to appear in The New York Times, and it can now be found in the Los Angeles Times, Chicago Tribune, The Times of London, Scholastic classroom magazines, the AARP bulletin and more than 150 other newspapers and publications worldwide. Over 30,000 teachers have joined our FREE KenKen Classroom program and use the puzzles to engage and teach over 1 million students. For more information, go to educator's page in site.


Now with enhanced online and mobile versions, you can find KenKen everywhere. Play unlimited games of all sizes and difficulty levels at, or find the KenKen Classic app in the App Store, Google Play Store, and the Kindle App store.  Whether in the classroom, on the beach, waiting for a bus, standing atop a mountain—anywhere you might be—KENKEN will be there to stimulate your brain. It’s the puzzle that makes you smarter!



For unlimited puzzles of all sizes and  difficulty levels,
visit fun math game site,
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