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Critical Thinking Puzzles Online


Discover the world of critical thinking puzzles online, where each challenge is an opportunity to sharpen your intellect and enhance your problem-solving skills. KenKen Puzzles offers an extensive array of free KenKen puzzles designed to foster critical thinking and logical analysis. These puzzles, ranging from logic puzzle games to complex reasoning games, are perfect for anyone looking to boost their cognitive abilities and engage in mentally stimulating activities. Critical thinking puzzles like the KenKen are more than just games; they are online tools for mental growth.

KENKEN for your Mobile

Fun, addicting, yet educational. The KenKen iOS and Android apps are perfect for the whole family!

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Why You Should Play our Critical Thinking Puzzles Online


Engaging with critical thinking puzzles online is an excellent way to cultivate these essential critical thinking skills…and it’s fun! Our logic puzzle games are designed to challenge your ability to analyze situations, make decisions, and solve problems effectively. By regularly playing our deductive reasoning games, you'll enhance your capacity for critical thinking, which is invaluable in both personal and professional contexts. Our KenKen puzzles cater to a diverse range of interests and difficulty levels, ensuring that there is something for everyone. Whether you're a beginner or a seasoned KenKen enthusiast, our critical thinking puzzles offer the perfect blend of challenge and enjoyment in a practical online format.

Find Critical Thinking Puzzles Online


Ready to take your critical thinking skills to the next level? Join our community of puzzle enthusiasts by exploring critical thinking puzzles online on our website. Play now and start your journey towards becoming a sharper, more effective thinker, all while playing the most addictive puzzles since sudoku. Our collection of free online puzzles is waiting to challenge and inspire you. Join us now and unlock the full potential of your mind!

Will Shortz, NY Times Crossword Puzzle Editor and
NPR Puzzle Master Loves KenKen! Find out why

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:

  1. Use each number only once per row, once per column.
  2. Cages with just one square should be filled in with the target number in the top corner.
  3. A number can be repeated within a cage as long as it is not in the same row or column.
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  1. 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.
  2. 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.
  3. 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. Click here to see the video of how it works.
  4. When you've ruled out one of your notes, click on it again in the Notes box. The number will disappear from the square.
  5. When you fill in a number in a square (by selecting from the number ring), any notes in that square will disappear.
  6. Changed your mind about a number? In the number ring, click the red eraser icon to clear the square.
  7. To hide the number ring, click the red "X."
  8. How to Use the Keyboard: You can enter numbers and notes by using the keyboard. Once you’ve selected a square, you can press shift and a number key to enter (or delete) that number as a note. Or, to just enter a number in a square, press that number on the keyboard (no shift). To delete a number or note, press C.
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