KenKen® is a math logic game that comes from Japan, and this particular grid is a difficult one! It requires testing different number combinations using addition, subtraction, multiplication and division and comparing them against the other columns and rows. If your highschooler can solve this puzzle, she'll be a KenKen® champion! Here's how to play:

Using the digits 1-8 in this 8x8 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.

“KenKen® is a registered trademark of Nextoy, LLC, ©2009, KenKen Puzzle LLC”.  All rights reserved.