Logic and problem solving are terrific skills to have. For the mathematical, you probably turn to the puzzles in your favourite newspaper.

Or, perhaps you go to Chapters and buy books.

But everyone's favourite mathematical puzzler is now online. The folks that generate these puzzles commercially offer billions to play online, free of charge.

It's not a guessing game either. Each puzzle has a logical solution and the joy of playing online is that you can check your efforts with the click of a button instead of flipping to the back of the book or waiting for tomorrow's paper.

You're warned though...these things are REALLY addictive!.

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