Number Treasury 3
Investigations, Facts and Conjectures About More than 100 Number Families
Written as a resource for both teachers and students, this enlarged third edition of Number Treasury is designed to guide readers through the steps that will help them to think critically, to provide explanations and to formulate conjectures about different families of positive integers. Its 137 exercises and 28 'investigations', at three levels of difficulty, cover such intriguing topics as magic squares, palindromic numbers and twin primes. Detailed solutions are provided at the back of the book.
Rubik's Quest: Cube Countdown
The Rubik’s-cube core of the world’s most important computer has been stolen, and it is the reader’s mission to recover it. Rather than reading from front to back, young adventurers must use their knowledge of shape, geometry and patterns – as well as their common sense – to solve the puzzles and plot their own unique path through the story. Age 7+