Sudoku is an easy to learn logic-based number placement puzzle with many benefits: Sudoku is a popular game among the elderly as it encourages them to utilise different parts of the brain they may not necessarily use in everyday life. According a recent Study published in International Journal of Geriatric, the more people over age 50 engage in games such as Sudoku, the better their brains function. According the same study This collection of puzzles will keep you or your elderly loved ones busy and entertained for hours!