posted by Jose Morales .
How do you complete Number-Grid Puzzles?
If you are referring to Sudoku, they are puzzles unrelated to math.
In fact, a sudoku puzzle could be made up of grids of nine celebrities instead of 9 digits!
The rule of the game (using digits) is to complete the grid so that every row, column and each of the 9 sub-squares of nine cells contain all the nine-digits, once and only once.
Different techniques are available for the different levels of difficulties of the puzzle.
Try for example: