400 Calcudoku, Mathdoku Printables KDP400 Calcudoku ( Mathdoku ) Puzzles with solutions for KDP. Activity Book Interiors for KDP, 8.5×11 in size, NO-bleed.Digital downloadDigital file type(s): 5 PDFHeight: 11 inchesWidth: 8.5 inches Mathdoku (sometimes called " KenKen ", " KenDoku ", " Calcudoku ", " Ken Ken, or Mathdoku ") is a logic problem with simple rules but difficult solutions.It's similar to Sudoku and Killer Sudoku, except you're dealing with addition, subtraction, multiplication, and