How many time zones does the contiguous United States have?
Which two primary paint colours are mixed together to make green?
Which Jamaican sprinter set the 100-metre world record of 9.58 seconds in 2009?
Sports
What artifact, unearthed in 1799, gave scholars the key to reading Egyptian hieroglyphs?
History
What 1927 Fritz Lang silent film is set in a futuristic city split between workers below and elites above?
Movies & TV