南京地铁1号线 Nanjing Metro Line 1

Try to name the 10 most populous urban areas in each of these historical years.

20 random countries have been removed from the map of the world! Can you identify them in 3 minutes?

With the help of a map, can you name the countries which existed during the Revolution of 1848?

Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.