IQ Brainteasers is the ultimate test of your brain power. Packed with over 300 puzzles, your visual, mathematical and lateral-thinking abilities will be stretched to the limit. Also included are some Japanese puzzles – Sudoku, Bridges and Slitherlink – which will really get your brain cells working. Divided into puzzle types, the sections are not in any order of difficulty – you are just as likely to find two easy puzzles side-by-side as a more tricky one next to a simple one. Some will require a degree of mathematical ability, others you just need to use your eyes, while others still will need some knowledge of words.