Kakuro is a logic puzzle that is mixed with a mathematical transliteration of a crossword puzzle, which causes you to use every bit of your brainpower to solve these numerical puzzles.Kakuro puzzles are regularly featured in many math-and-logic puzzle publications across the world. This is a 6X9 puzzle pack that has 161 pages: 80 pages, containing 2 puzzles on each page equaling 160 challenging puzzles. The pack includes solutions for all puzzle pages. This makes for a great gift for the math and logic lovers in your life!Perfectly sized at 6x9 High-quality paper allows for perfect absorbency with pens, gel pens, or even markers. 161 pages Glossy Cover Perfect for gift giving