When you buy this book you get an electronic version (PDF file) of the interior of this book. Kakuro is a fun and addicting logic puzzle game that combines logic thinking with an addition math game. Kakuro is a fun way for kids to practice addition facts. Kakuro teaches your child logical thinking and deductive reasoning skills, even at a young age. Kakuro improves critical thinking and making quick decisions based upon available evidence. Kakuro is a brain game that helps to train the brain of your child. In addition, Kakuro demands attention to detail - noticing patterns, spotting opportunities, and finding the right moment to make a move. Kakuro is not only fun and interesting – it might just help prepare your kids for better success in school and in life. Kakuro For Kids Mixed Grids - Easy to Hard is a collection of 141 puzzles: 12 Kakuro 5x5 puzzles 12 Kakuro 6x6 puzzles 16 Kakuro 7x7 puzzles 16 Kakuro 8x8 puzzles 16 Kakuro 9x9 puzzles 24 Kakuro 10x10 puzzles 24 Kakuro 11x11 puzzles 21 extra logic puzzles The goal of Kakuro is to insert numbers into the white cells. Possible numbers are always 1 to 9. The sum of each horizontal block must equal the clue on its left. The sum of each vertical block must equal the clue above it. You can only use a number once in each horizontal or vertical block. I guarantee that every logic puzzle in this Kakuro book has been carefully checked to ensure that each puzzle has only 1 solution. Kakuro is also known as Cross Sums, Kakro, Kakkuro and Cross Addition. Kakuro is also quite often misspelled as Kakura.