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Kids will have plenty of number fun with these 77 puzzles - 55 of which are in a smaller 6x6 size to develop their skills, whilst the other 22 have regular 9x9 grids.

Intended for kids, this title contains puzzles. Instead of the usual sudoku grid, which goes from 1 to 9, most of these puzzles go only from 1 to 6. It has an introduction which teaches the basic sudoku rules and offers hints on how to figure out which number goes where.

Taking a page from karate - another Japanese art - each title in the series is graded by colour: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. Each title also contains 300 puzzles.

Taking a page from karate - another Japanese art - each title in the series is graded by colour: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. Each title also contains 300 puzzles.

Give your brain a workout on the type of brainteasers that challenge the best solvers at the World Puzzle Championships. They're tough, but fun, and the feeling of satisfaction you get when you succeed is simply unbeatable. Some of the puzzles are oldies but goodies, like battleships--and its many variants--where you search for a fleet hidden within a grid. In "Eminent Domain," try to determine which blanks cells are owned by the numbered ones. For "Hex Loops," locate a path that travels through adjacent the trick is, it has to end where it started, and the lines can't touch or cross. From Snaky Tiles to Spiral Galaxies, these level conundrums will get your mind in shape.

Sudoku for the super-smart Mensa members are known for their finely-honed logic skills--and that's just what it takes to become an expert at sudoku. So it's no surprise that this organization for the highly intelligent has put together a huge collection of these sizzling-hot puzzles--a whopping 534 games to sate the obsessed solver's craving. They start out relatively easy for the newcomer, and get harder (and more fun ) as you go along.