A revision-guide and workbook that explores everything you'll ever need to know about binary and hexadecimal number systems for the GCSE in Computing or Computer Science.Updated to fix all known issues May 2016.In this innovative edition each example and question has an online video component that clearly explains how to complete the exercises.Covers the following topics: What is a Number System?Converting from Binary to DenaryConverting from Denary to BinaryBinary AdditionBinary SubtractionConverting from Hexadecimal to DenaryConverting from Denary to HexadecimalConverting from Binary to HexadecimalConverting from Hexadecimal to BinaryBitwise ManipulationIncluding: Worked ExamplesPlenty of Questions for you to practiceFlow charts of the techniquesQR code links to videos of worked exampl