Suduko

This is the new challenging game that I've been doing as of late.  I was introduced to this game last month and it continues to interest me every chance I get to play it.  Challenges themind I would say.  :)

Each row, column and “area” (3*3) should contain the numbers 1 to 9 however: 
Number can appear only once on each row 
Number can appear only once on each column
Number can appear only once on each area (3*3 slots)
The bottom line : the number should appear only once on row, column or area.