Advent Puzzles 2014: puzzle 9 solution Advent puzzle 9: complete the grid (see picture) with the digits 1 to 9 once each so that all equations are correct. pic.twitter.com/gz48aiWYBY — Portsmouth MathsJam (@MathsJamPOR) December 9, 2014 AdvertisementShare this:TwitterFacebookLike this:Like Loading...