Yonmasu ("Yonmasubunkatsu") is a logic puzzle invented by Naoki Inaba (Japan). A rectangular or square grid contains circles in some cells. The goal is to divide the grid into regions of exactly four cells. Each region contains one circle. logic puzzles for adults - logic puzzle books for adults - logic puzzle book - logic puzzle games - logic puzzle for adults - logic puzzle activity book - logic puzzle adult - logic puzzle grid - logic puzzle magazine - logic puzzle magazine for adults - logic puzzle workbook - logic puzzles for middle school - logic puzzle answers - logic puzzle books for middle school - logic puzzle brain teaser - logic puzzle beginner - logic puzzle daily - logic puzzle for middle school

CalcuDoku is a mathematical and logical puzzle loosely similar to sudoku. It was invented by a Japanese mathematics teacher Tetsuya Miyamoto. The objective is to fill the grid in with the digits 1 through N (where N is the number of rows or columns in the grid) such that: * Each row contains exactly one of each digit. * Each column contains exactly one of each digit. * Each bold-outlined group of cells (block) contains digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication (×), and division (÷). * Unlike Killer Sudoku, digits may repeat within a block. calcudoku puzzle books - math puzzle books for adults - math puzzle books - math puzzle for adults - mathematical puzzles - mathematical puzzle books - mathematical puzzle books for adults - mathematical puzzles with answers - mathematical puzzle games - mathematical puzzle books - mathematical games and puzzle - mathematical crossword puzzle with answers - mathematical jigsaw puzzle - japanese mathematical puzzle - mathematical logic puzzle - mathematical matrix puzzle - mathematical mind puzzle - mathematical matching puzzle - math puzzles for middle school - math puzzle brain teasers

Have you tried the Japanese puzzle of Nurikabe? This amazing logic puzzle has become increasingly popular in Japan. Inside this book, you will find 160 puzzles of varying difficulty, each one with its own solution, allowing you to test yourself with ever greater complexity as you progress from novice to pro. For a great way to exercise your brain and stimulate your powers of concentration, Nurikabe Puzzles is the book for you.

Try Gokigen Puzzles - great fun for all ages. Each Gokigen puzzle consists of a square with numbers. To solve the puzzle you must use diagonal lines to connect the corners. The number shows how many diagonals can convert at that point. Each puzzle is unique and there are 300 to solve. Each solution relies solely on logic, no guessing needed. 300 puzzles 10 inch x 8 inch format 6 puzzles per page Solutions pages for easy checking of answers Pages are numbered for easy reference This collection that will keep you busy for hours.

Gokigen Japanese Puzzle BookThanks to this book, you will become the best with Gokigen puzzles. Practice and find solutions in the shortest time possible. With 300 different puzzles, you can challenge your brain whenever you want. If you need it, you will also find solutions (look inside). This book features:

Irasuto ("Illustration") is a logic puzzle created by Naoki Inaba (Japan). A rectangular or square grid contains white and black cells with numbers. The goal is to blacken some cells of a grid according to the following rules:

Heyawake (from Japanese, "divided rooms") is played on a rectangular grid. The grid is divided into rectangular "rooms." Some rooms may contain a single number. These rooms must have the designated number of cells painted black. Other rooms may have zero or more cells painted black.

Hakyuu (also known as "Ripple Effect", "Hakyuu Kouka", "Hakyukoka", "Seismic") is a logic puzzle published by Nikoli. The puzzle consists of a rectangular grid of any size divided into polyomino sections called "rooms". Each room must be filled with each of the numbers from 1 to the number of cells in the room. If two identical numbers appear in the same row or column, at least that many cells with other numbers must separate them.

Keep your mind sharp, healthy, and young with classic Japanese square box puzzles from Sudoku and Kakuro to Numberlink and Hanjie...and more! Puzzles are known to boost brain power—they improve memory, spatial awareness, logic, and problem-solving. Other benefits include improved mood, reduced stress, and a delay in the onset of dementia and Alzheimer’s disease. Now, you can make brain training a part of your daily routine with over 200 classic Japanese puzzles designed to boost your memory, concentration, and overall brain health. Train your brain while having fun! Inside you’ll find a variety of Japanese square box puzzles ranging from easy to hard, including: - Sudoku - Hitori - Slitherlink - Kakuro - Shikaku - Purenrupu - Akari - Tentai Show ...and many more!

Chiryoku = Intellectual Power. Compared to the West, people in Japan live longer, healthier lives and at the heart of their culture – and part of their daily routine – are brain-training puzzles. The square-box puzzles here, familiar to millions in Japan, are a workout for your mind. Test and strengthen your mental agility, concentration, numerical skills, powers of reasoning, observation and creative thinking. Enjoy working through puzzles that will take you from total beginner to master mind and help keep your brain healthy for years to come.