A Number Puzzle a DayBy: Kate Nolan, Sam Smith, Kirsteen Robson Illustrator: Michael Hill Series: An Activity A Day A year's supply of engaging number puzzles, such as magic squares, sudokus and simple mathematical brainteasers. Every challenge has a different theme, from birds and baking to rabbits and robots and difficulty gradually progresses through the book. Perfect for keeping kids entertained at home or on the move. Hints and tips help children to learn new problem