This Sudoku Puzzle Book Features 100 easy Sudoku Puzzles With Answers Clear 9x9 Grids Big 16pts text Fonts Large Print 8.5x11 dimensions Perfect Gift For Adults and kids Benefits Of Playing Sudoku Puzzles Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. ... Stimulates your mind. It reduces the chances of developing Alzheimers by keeping your brain active. Helps you Learn to do things quickly. Increases your concentration power. Makes You Feel Happy.