27 April 2016


Title: Elasticity
Rating: 3/5

After last week's mod 9 sum, this week is a mod 9 product.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must multiply to the indicated product (mod 9).   
  • Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.  

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