The word 'Google' originated from a spelling error.
Why it is true
The idea was based on the mathematical number 'Googol' (1 followed by 100 zeros), but the founders registered the word with an 'e' by mistake.
Source: Technology History
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.