Sudoku isn't a math puzzle. The original Japanese version just used four different characters. Only when it was brought to the West did the numeric symbols come into use.

I competed in the Google/DaVinci Code contest (So Dark the Con of Man). One of the rounds was a Sudoku puzzle, but using ancient symbols.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris