Australia's funniest mathematician returns in 2018 with more rollicking romps through the world of science, technology, numbers and all things nerdy. Which number terrifies 0gdokontaheptaphobes? Why would you watch the same clock for 14 years? And have you met the 23-million-digit prime? The answers to all of these questions - and much, much more - are in 2018's greatest geek-fest, Adam Spencer's Top 100. Bursting at the seams with puzzles, quizzes, games, numerical trivia and fun, this is the ultimate book for maths nerds and anyone with an inquiring mind. Whether you're 8 or 80, strap your thinking cap on, grab a pencil and get ready to count down from 100 to 1 with Australia's favourite - and funniest - mathematician, Adam Spencer.