100 Large Print Sudoku Puzzles Progressing from Easy to Hard ¿¿¿¿¿This Book Contains:25 x Single Sudoku Puzzles 25 x Double Sudoku Puzzles 25 x Pyramid Sudoku Puzzles 25 x Samurai Sudoku Puzzles Want to keep your brain fit, young and flexible? Are you worried about age-related cognitive decline? Looking for something engaging but not stressful? There's a growing body of research on the role lifestyle factors can have in preventing or delaying cognitive decline. A study was run in 2014 on over 65,000 participants, assessing the effect regularly engaging in cognitively stimulating leisure activities like sudokus or crosswords can have on your brain's functioning. It was found regularly solving challenging puzzles like sudokus is significantly positively associated with: - Grammatical reasoning (strongly linked to decline with age)- Spatial working memory- Episodic memory scores (strongly linked to decline with age) Furthermore a study published in the Journal ofEuropean Psychiatric Association in 2010 found a brief two week training program in sudoku challenges improved cognitive reasoning in older adults. So if you want to keep your brain young, fit and sharp, scroll up and click 'add to cart' button now!