The post 20 Printable Sudoku Puzzles to Test Your Smarts appeared first on Reader's Digest. You want to start with the easy ones, but if you're an expert, you can skip to the extra hard puzzles.

The latest iteration, version 1.3, can now recognize print ads in magazines and solve fairly difficult sudoku puzzles in a few seconds, and is also faster at processing barcodes and QR codes seen ...