A "number puzzle" is a type of game or challenge that involves arranging or manipulating numbers to achieve a specific goal. These puzzles can take various forms, such as Sudoku, where players fill a grid with numbers while following certain rules, or logic puzzles that require deductive reasoning to find the correct arrangement of numbers. Number puzzles are popular for their ability to enhance problem-solving skills and logical thinking. They can be found in books, newspapers, and online platforms, appealing to people of all ages. Engaging with these puzzles can provide both entertainment and mental exercise, making them a favorite pastime for many.