-.ferchx.- - 2018-03-18  8:41 PM 
 
-.ferchx.- - 2018-03-18  2:53 AM 
 
Hi! 
I don't understand the sudoku Killer Joker Sudoku... 
What number is the joker in the exemple? Thanks
The number 4 is the joker. It takes the value 8 to make the sum 16 in the cage on the top left.