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

Red Ken Ken 4x4 logo on a cream background

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<h3><strong>About KenKen</strong></h3><p>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.<br>&nbsp;</p><h3><strong>How to Play&nbsp;</strong></h3><p><strong>Rules</strong></p><p>Solve the 4x4 grid by filling in empty squares with digits 1 through 4. The puzzle is solved when each row, column, and cage within the puzzle contains the digits 1 through 4 with each digit only appearing once.</p><p>The outlined areas within the puzzle are called “cages.”</p><p>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.</p><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><p>A cage with a single square is a freebie.</p><h3><strong>Controls</strong></h3><p>If you get stuck, click or tap the lightbulb to reveal a selection of helpers and hints.</p><p>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.</p><h3><strong>Scoring</strong></h3><p>Your score is based on the time it took you to solve the puzzle.</p><p>Your score will be disqualified if you use Check Level or Reset.</p><h3><br><strong>Helpful Tips&nbsp;</strong></h3><p>While traditional Sudoku is about utilizing logic, KenKen is more of a mathematical puzzle.</p><p>Start by filling in any freebie cages.</p><p>&nbsp;Next, look for cages where there’s only one mathematical solution.</p><ul><li>e.g. “7 +” in a two-square cage can only mean numbers three and four.</li></ul><p>Cages that utilize prime numbers as their target number can be easier to solve, as there are less possible solutions.</p><p>&nbsp;Leverage notes to help you jot down possible answers.</p>

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.