There are several sites where one can head to for free sudoku puzzles:
This game is easy: each box, row & column must contain the numbers 1 to 9.
Example: Given the following puzzle...
Blue line = possible location of number
Red line = eliminated locations
It's a series of elimination:
It's also a series of deduction:
The process is repeated & checked until the solution is as follows:
Try out the puzzle the next time you pick up a newspaper, it's fun & quite challenging! :)