Here is how to solve a sudoku puzzle (no math):1. You'll be given some numbers to start each puzzle. These cannot be moved or changed.
2. Each row, column, and 3-by-3 grid must contain one and only one instance of each number (1 - 9). You can never have the same number in any row, column or 3-by-3 grid, or "region."
3. A properly constructed sudoku puzzle has only one correct answer.