Colours On The Flag Of Austria

Name the 10 cities with a urban population of at least 10 million which have the shortest distance to London.

With the help of a map, can you name all the states of the German Confederation in 1848?

Evil aliens have decided to kill everyone in Europe! Fortunately, they've given you 45 seconds to save as many as you can. All you have to do is name a country to save everyone in it.

In each randomized group, name any answer which matches the first category to reveal the second category, etc...