Water boils at 100 degrees Celsius anywhere on the planet.
Why it is true
Water boils at 100 degrees Celsius only at sea level. At higher altitudes, atmospheric pressure is lower and water boils at lower temperatures. At the top of Mount Everest, water boils at about 70 degrees Celsius.
Source: Nature
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.