Challenge yourself at home with word and number puzzles A mental workout to rival Su Doku! Dozens of addictive number puzzles to challenge your mental arithmetic, multiplication skills and deductive reasoning. Perfect for all number puzzles addicts looking for a challenge. Varying levels of difficulty are included to test your mettle. Detailed rules and examples are included. Ideal for relaxing at home, on holiday or on the daily commute. Use your mental agility, logic and powers of deduction to tackle this collection of brainteasing puzzles from The Sunday Times. 60 Easy, 80 Medium and 60 Difficult puzzles included.