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This is a nifty number puzzle that calls on a trifecta of skills to solve: patterns, logic, and simple math.

Red Ken Ken 4x4 logo on a cream background

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<h3>About KenKen</h3>Who doesn’t love to play games at school? KenKen was created by Japanese math teacher Tetsuya Miyamoto to help students improve their math and problem-solving skills. The puzzle turned out to be so addictive, in fact, it became a favorite activity for all ages outside of the classroom and quickly became a worldwide phenomenon. &nbsp;<h3>How to Play&nbsp;</h3>RulesSolve the 4x4 grid by filling in empty squares with digits 1 through 4. The puzzle is solved when each row and column within the puzzle contains the digits 1 through 4 with each digit only appearing once.The outlined areas within the puzzle are called “cages.”The top-left corner of each cage contains a target number and mathematical operation (+, -, x, division). The numbers you enter in the cage must combine to equal the target number by utilizing the specified mathematical operation.<ul><li>e.g. “6 +” means the numbers in the cage must be added together to equal six.</li><li>e.g. “8 x” means the numbers in the cage must be multiplied to equal eight.</li></ul>A cage with a single square is a freebie.<h3>Controls</h3>If you get stuck, click or tap the lightbulb to reveal a selection of helpers and hints.Check Cell, Check Level, Reveal Random Cell, Reveal Cell, and Reset are all considered hints. You must disable Expert mode to use hints and using them will impact your score.<h3>Scoring</h3>Your score is based on the time it took you to solve the puzzle.Your score will be disqualified if you use Check Level or Reset.<h3> Helpful Tips&nbsp;</h3>While traditional Sudoku is about utilizing logic, KenKen is more of a mathematical puzzle.Start by filling in any freebie cages.&nbsp;Next, look for cages where there’s only one mathematical solution.<ul><li>e.g. “7 +” in a two-square cage can only mean numbers three and four.</li></ul>Cages that utilize prime numbers as their target number can be easier to solve, as there are less possible solutions.&nbsp;Leverage notes to help you jot down possible answers.

How to Play

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kenken 4x4 icon with a red and black rectangles

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KenKen 4x4 is a nifty number puzzle that calls on a trifecta of skills to solve: patterns, logic, and simple math. 

KenKen 4x4 - Number Games | Puzzle Society

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Try your hand at this nifty number puzzle that calls on a trifecta of skills to solve: patterns, logic, and simple math.