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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.

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KenKen Classroom

KenKen Classroom

Free Teaching Tool: KenKen Classroom

KenKen was born in a math classroom—and we want it to stay there! That’s why we introduced our KenKen Classroom Program for teachers. Every week, we’ll email you a set of free KenKen puzzles that is perfect for student use! As the challenge level subtly shifts week to week, students develop their math and logical thinking skills without even knowing it. And it’s all absolutely FREE!

Students love KenKen for the same reasons you do: It’s fun, it’s challenging, no two puzzles are alike, and you get to use different parts of your brain. As a teacher, you can be confident that your students are mastering basic computation skills while employing advanced problem-solving strategies.

Just click below to sign up now for the totally free KENKEN Classroom Program(KKCR)!

Receive KKCR Emails

* We will send out weekly KKCR emails on every Friday. You do not need to login nor password to receive puzzles.

** The KENKEN Classroom Program is a limited time offer, subject to change or expiration without notice.

Follow the Leaderboard

Join the leaderboard by subscribing with us! Solve puzzles without using any hints.

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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