Did you know KenKen® means "wisdom squared" in Japanese? Your middle schooler will need to use his wisdom to fill in this KenKen® grid. He'll use addition, subtraction, multiplication, and division along with a bit of logic. Here's how to play:

Using the digits 1-4 in this 4x4 puzzle, fill the small squares with digits so as not to repeat a digit in any row or column, and so that the digits within each heavily outlined area will equal that area’s corner number when combined using the indicated operation. For more information visit www.kenken.com.

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