I Used to Know That has continued to delight readers with its pages of forgotten facts from our school days. I Used to Know That is an ideal and accessible reference guide for adults wanting to brush up on their lost knowledge - or prepare for a pub quiz!

If you've forgotten the capital city of Chile; the basics of osmosis; how to solve a quadratic equation; who wrote the famous poem about daffodils; the use of a conjunction or the number of continents in the world, I Used to Know That is guaranteed to provide all the answers.