Challenging Knowledge Quiz
What word is used for a number less than zero?
What was the world's largest city in 200 AD?
What is the chemical combination of silicon and oxygen called?
With what American city is the cheesesteak sandwich commonly associated?
The main character in "Murder, She Wrote" is a retired teacher of what subject?
In which city was the there a 'Great Fire' in the 19th century?
Who sang the famous song "Circle Of Life" (1994)
What is the name of the media mogul and politician who resigned as Prime Minister of Italy in November 2011?