Cross Codes (Mensa) : What do you get when you mix a crossword and a cryptogram? Cross Codes, of course! These super puzzles have grids that look like a crossword but with small numbers from 1 to 26 in every square. Those numbers are your starting point: you're told what letters a few of them represent. Using logic and knowledge of word patterns, solvers will begin to meticulously crack the code, figuring out which letter goes with what number, and filling in the grid with everyday words. Keep in mind that each puzzle uses every single letter in the alphabet. But beware: no proper nouns, abbreviations, or foreign words allowed!