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Why are there ads?

We would love to provide everyone an ad-free experience, but we do need to generate revenue to cover at least some of our overhead. We're trying to be as reasonable as possible, and it also allows us to continue to offer you an option to access KenKen puzzles for free. For those who prefer an Ad-Free playing experience, we have an option for just pennies-a-day and it can be canceled anytime. BONUS! KenKen Premium also allows you to Track Your Progress, Join The Leaderboard, Save Puzzles, and more. Please consider this option for the best experience.

In addition, we continue to offer -- pro bono -- our KenKen Classroom Program which provides free KenKen puzzles and lessons to over 1 million students weekly. Revenue we raise from advertisements and subscription sales allow us to keep the program going, plain and simple. So thank you for supporting these teachers and students by supporting us. We all appreciate it.


KenKen Cool Facts

Trivia about your new favorite game

“Ken” means “Wisdom” in Japanese, so KenKen is “Wisdom Squared”

The original Japanese name for KenKen is “the Kashikoku Naru puzzle,” which means “the It-Makes-You-Smarter puzzle”

KenKen was invented by Japanese math educator Tetsuya Miyamoto in 2004, under his philosophy, “The Art of Teaching Without Teaching”

KenKen appears daily in the New York Times newspaper since 2009, the only daily feature ever added since NY Times crossword puzzle.

KenKen now appears in over 150 publications worldwide including The New York Times (daily newspaper and online), Times (UK), Los Angeles Times, AARP Bulletin, Scholastic Math Magazine. Represented by Universal Uclick, world’s largest independent press syndicate.

100,000+ interactive KenKen games played daily online

25,000 teachers worldwide subscribe to the free KenKen Classroom program (www.kenkenpuzzle.com/teachers)

Over 125 Million games played online since 2009.

KenKen puzzles are created through an artificial intelligence program called “The Kenerator”

KenKen is available in mobile apps, Kindle, websites, books, newspapers & magazines.

Will Shortz, North American “Puzzle Master” & New York Times puzzle editor calls KenKen “The most addicting puzzle since sudoku”

KenKen is for everyone. No age, gender or language limitations


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General questions & Concerns: customercare@kenken.com

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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!

Team KenKen