Audio & Video
Beat the Calculator
Kjartan Poskitt proves what looks complicated can be simple.
- Beat the Calculator
- 1089
- Perfect pentagon
- Fabulous flexagon
- Making Cubes
- Prime number pizza
- Numerical masterclass
- Q&A with Kjartan Poskitt
- Reading from The Crossover
- Sport brings us together
- Question and Answer - Part 2
- The main characters
- School days and writing
- Illustrating the Book
- Writing Tips with... Catherine Rayner
- Dealing with Racists
- Book Introduction
- Introducing us to new historical figures

















