Sudoku is the highly addictive puzzle game that uses pure logic and requires no math skills to solve. The goal is to fill the blank squares with the numbers 1 through 9 without repeating a number in each column, row, or 3x3 block. Each page of this pretty calendar features a different Sudoku puzzle, ranging from easy to difficult, with the answers on the back. With its sophisticated design and splash of color, the Posh Sudoku 2012 Day-to-Day Calendar makes problem solving stylish and fun. Size Closed: 5.5" W x 5.5" H. Size Open: 5.25" W x 5.25" H. ISBN-13: 9781449404598. ISBN-10: 1449404596. Andrews McMeel Publishing Posh Sudoku 2012 Boxed Calendar #CAL-12-AND-1449404596 - Calendars