In his books on the working of the memory and brains, Gary Small, states that our brains age the same way our bodies age. The Memory Bible (2002) and Prescription (2004) Playing number puzzles such as Sudoku, Hidato and Numbrix strengthen your pattern solving abilities. We can replace the numbers with symbols, sounds, smells, situations, shapes and whatever. Improving your associative memory does not only improve your number analyzing skills. Solving Sudoku puzzles is more than numbers In other words: solving Sudoku's with elimination strategies rather than guessing make us smarter. The combination of logic and sequential thinking stimulate our associative memory skills. It is not necessary and even not wise to guess the position of the numbers.

Sudoku is not a math puzzle but a logic and intelligence puzzle.

Printable and easy for the eyes Sudoku puzzles. We figured out that instead of using our time to write them all down, we better focus on making There are literally hundreds of websites that have superb solving strategies and techniques for solving Sudoku puzzles. There are 2 sixes in our top right regions and this is. The regions and are the marked 3 by 2 areas (3 x 2 equals 6 numbers), whereas in a 9 by 9 grid the regions are 3 by 3 Similar to the row and column rules, each number must be filled in once in each region of a Sudoku grid. Numbers may only appear once in each region. 4! Please note that in case of a 9 by 9 grid, we have to fill in the numbers 1 to 9 in the rows, columns and regions.ģ. Which 2 is wrong? The 2 in position 5 is wrong and needs to be changed to a. Also this is not allowed, as we need to fill in the numbers 1 to 6 once in each row, column and region. Numbers may only appear once in each column. This is not allowed! The first one (in position 3) is wrong and should be a. In this example we have 2 ones in the first row. The numbers 1 to 6 must be filled in each row and column once.

In whatever format are divided in rows, colums and regions (marked by a thick black line). Numbers may only appear once in each row.

Free medium sudoku puzzles printable