Beyond the answers - interesting background to this quiz

A nickname that stuck: the film with no real title

Federico Fellini's "8½" takes its odd name from its place in his filmography: he had made six features, plus two short episodes and one collaboration, which he counted as eight and a half films. The story follows a blocked director, played by Marcello Mastroianni, drifting between memories, fantasies and the chaos of a spa. Its dreamlike structure helped make it a landmark of European art cinema.

The book that kept changing its name

Agatha Christie's mystery about ten strangers lured to an island was first published in 1939 under a title that included a racial slur, then renamed "Ten Little Indians" for later editions and eventually "And Then There Were None". The plot, in which guests die one by one according to a nursery rhyme, became one of the best-selling mystery novels ever written. Its shifting titles say as much about changing sensibilities as about marketing.

A realm that stretches far beyond Europe

Greenland, the world's largest island, and the Faroe Islands are both part of the Kingdom of Denmark, though neither is part of the European Union. Greenland was a Danish colony until 1953 and gained home rule in 1979, with further self-government in 2009. The Faroes have run most of their own affairs since 1948, and both territories send representatives to the Danish parliament.

The river that dwarfs the rest

The Amazon carries more water than any other river on Earth, and its drainage basin covers roughly 40 percent of South America. That basin spans Brazil, Peru, Colombia, Bolivia and several smaller countries, and the river's flow is several times that of the next largest river system. Its scale shapes weather, ecology and human life far beyond its banks.

The samosa's long journey

Samosas, the stuffed and fried pastries listed here as a popular Asian snack, have a history that reaches well beyond South Asia. Related filled pastries appear across Central Asia and the Middle East, and the name itself derives from Persian. Today they are sold from street stalls in India and Pakistan, served as appetisers at weddings, and adapted with fillings from spiced potato to minced meat.