Killer Sudoku is a mix of Sudoku and Kakuro. Your goal is the same as in regular sudoku: fill every row, column and 3x3 region with the numbers 1-9 once. The difference is how you arrive at those numbers.In killer sudoku, no numbers will be filled in at the start. An in addition to the rows, columns and 3x3 regions, every cell is also a part of a cage, indicated by different colors. Each of these cages has a sum, and you must work out what numbers to put in each cell based on the sum of the cage. Each cell in a cage is added up and must match the sum of that cage.
In this book we have contained more than 500 puzzles with answers easy to hard.You will be able to think hard and you can learn logical thinking. We highly recommend this book for high school students and enyone who like to learn new techniques in killer sudoku.