Alphametic sudoku puzzles combine the challenges of both alphametics and sudoku puzzles. In order to solve the alphametic sudoku puzzles, you have to solve first the alphametic equation such as SUDOKU=IS*FUNNY whose unique solution is 426972=34*12558, then you can use all your techniques and skills to complete the number-placement puzzles. You may increase your puzzle IQ by solving the 50 alphametic sudoku puzzles with double challenges and pleasure. About the author: Xin-She Yang has a Ph.D in applied mathematics from Oxford University. He is currently a research fellow at Cambridge University.