Beyond the answers - interesting background to this quiz

The moon count that keeps changing

Jupiter is the quiz's answer, and it has long been the giant of the solar system in more ways than one. Its four largest moons - Io, Europa, Ganymede and Callisto - were spotted by Galileo in 1610 and are still studied today because Europa may hide a liquid ocean beneath its icy crust. Saturn, however, has been catching up as astronomers find more small, distant moons, so the "most moons" title is worth watching.

A capital that gave its name to a syndrome

Stockholm sits spread across a cluster of islands where Lake Malaren meets the Baltic Sea, which is why it is sometimes called the Venice of the North. The city also lent its name to Stockholm syndrome, a term coined after a 1973 bank robbery in the Swedish capital. Kiribati's capital, Tarawa, could hardly be more different: a thin strip of coral atoll in the Pacific, and one of the most crowded places in the region.

The strongman behind Carlo Pedersoli

Bud Spencer was the screen name of Carlo Pedersoli, an Italian who competed as a swimmer before turning to film. He and Terence Hill made a string of comedy westerns and action films in which his character usually settled fights with a heavy fist and a deadpan face. The Piedone films cast him as a gruff Naples police inspector, and they made him a household name in Europe.

The cat breed with a Manx cousin

The Cymric is essentially a long-haired version of the Manx, the tailless cat associated with the Isle of Man. Some Cymrics have a short stump of a tail, others none at all, and the breed is known for a rounded, sturdy build. The Manx gene is unusual because it affects the spine and tail, which is why breeders take care when planning litters.