Sudoku is a type of logic puzzle that has been popular in Japan for about 20 years. However, the world has caught on to the challenge of sudoku. Sudoku means "single number" in Japanese, but the puzzles are also known as "Number Place" in the United States. Despite using numbers, this is not a mathematical puzzle. Logic skills and a lot of time and patience are needed to solve sudoku.
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Most Helpful Customer Reviews
16 of 17 people found the following review helpful:
1.0 out of 5 stars
poorly designed puzzles,
Amazon Verified Purchase(What's this?)
This review is from: Sudoku (Spiral-bound)
You might wonder how a sudoku puzzle can be poorly designed...the puzzles in this book violate at least two of the rules in good puzzle design. The first is that a well designed puzzle is symmetrical. You should be able to copy the puzzle and rotate it 180 degrees and the numbers should overlap. None of the puzzles in this book are designed that way. The second rule is that there should be only one correct answer. Many of the puzzles can be completed in multiple ways.
Two great things about the book are the spiral binding...and the main reason I selected it initially...and the small size. It fits in your purse so you have an activity with you all the time.
6 of 7 people found the following review helpful:
1.0 out of 5 stars
VIOLATED,
Amazon Verified Purchase(What's this?)
This review is from: Sudoku (Spiral-bound)
This "green 4" book should not be sold as a Sudoku puzzle. Nearly HALF of the puzzles are MULTIPLE SOLUTION. Sudoku is supposed to be ONE UNIQUE solution for each puzzle - this book violates that rule. I have to wonder who gave this book a 5-star rating ....
SUMMARY: The book is very frustrating since it has ERRORS galore.
2 of 2 people found the following review helpful:
4.0 out of 5 stars
Handy!,
By L. Moop "Insane for sudoku" (Michigan) - See all my reviews
This review is from: Sudoku (Spiral-bound)
I love Sudoku and I love this little book. It's small enough to fit into my purse and pop it out when I'm waiting for an appointment, during my kids' practices, whenever I have a few minutes to spare. Being spiral bound also makes it even more convenient and compact.
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