Get your brain working with 200 grid-based logic puzzles from the Puzzle Baron! Filled with complex and fun brain teasers that range in difficulty, this book will put your mind into overdrive with hours of brain-challenging fun. Using the given backstory and list of clues, readers use pure logic to deduce the correct answer for each fiendishly tricky puzzle in Puzzle Baron's Logic Puzzles. Bring out your competitive side and check your stats against the average completion time, the record completion time, and the percentage of people who finish the puzzle. Check your work against the answer key and see how logical you really are! Perfect for adults or children, Puzzle Baron's Logic Puzzles is the ultimate challenge for those who love piecing clues and facts together. The brain is a wonderful thing to tease!

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:

From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 of your favorite Star Battle puzzles. These puzzles will provide a healthy diversion for you in these challenging times, and help you make it to the other side with your sanity intact! Includes an instructive and pithy tutorial.

Every sudoku fan knows that this popular number puzzle has always flirted with math. But the two have never come together...until now! Meet Calcu-doku, the newest and sure to be hottest development in the sudoku world. All that’s needed is simple arithmetic, so even solvers who aren’t mathematically inclined will have fun. Each puzzle looks like a normal sudoku, except for sectioned-off smaller areas that contain a little math symbol and a number. For example, let’s say that two numbers are boxed in with a "21x” in the corner: that means they multiply to 21, so they must be either 3/7 or 7/3. All the other traditional sudoku rules remain in place, but the added variety of a little touch of math makes Calcu-doku extra-addictive. Plus: 144 regular sudoku, too!

Calcu-doku has taken the puzzle world by storm, providing solvers with many happy hours of logical thinking and simple mathematics. Now, world sudoku champ Thomas Snyder takes it to the next level. He ups the ante by incorporating unique themes into the mix: so your starting numbers might be in the shape of a smiley face, or the secret to solving might revolve around the number 5. Snyder has pulled out all the stops-and created a compelling, captivating, and creative variation on Calcu-doku.

This Logic Puzzles book is packed with the following features: - 500 Easy to Hard Puzzles & 12 Puzzle Types. - Answers to every puzzle are provided. - Sorted into three levels of difficulty (Easy, Medium, and Hard). - Each puzzle is guaranteed to have only one solution. - Includes free bonus puzzles.

Exercise your mind with the next volume in the ultimate collection of brain puzzles You know that keeping your brain healthy is just as important as taking care of your body--and puzzles are a fun way to do it! All puzzles are great for brain health, but different kinds of puzzles strengthen different mental skills: Crossword puzzles boost vocabulary, Cryptograms test deductive reasoning, and Sudoku is good for number sense. This brain puzzles book for adults features 6 different types of puzzles, with a section for each one that includes an instructional warm-up and a quick explanation of its brain health benefits. The puzzles progress through four different challenge levels, so you can watch your skills improve while strengthening your mind. With an updated format, the Ultimate Brain Health Puzzle Book for Adults Vol. 2 lets you choose the puzzle that fits your mood and enjoy hours of brain-boosting fun. Sharpen your pencils and start building brainpower today with the best choice in brain puzzle books for adults.