Challenge yourself at home with word and number puzzles Push your nerve and logic to the absolute limit with this third collection of The Times Killer Su Doku. The puzzles use the same 9x9 grid as normal Su Doku but with an added mathmatical challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number. With 150 new Killer Su...