Sweden has more than 267,000 islands.
Why it is true
Sweden has more than 267,000 registered islands, the highest number in the world. Most are small and uninhabited, but the Stockholm archipelago alone has about 30,000 islands.
Source: Statistics Sweden
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.