Who invented the '=' sign, and when? Answer here.
What is the only vegetable to have been re-classified as a fruit? Answer here.
How many people went to Ikea in 2004/5? How many went in 2007/8? Answer here. And here!
Why would a shop selling pianos have to pay royalties? Answer here.
In the 16th century, what could you be fined £20 a month (the average ANNUAL salary of a teacher!) for? Answer here.