There are so many questions I have never been asked, simply because there are too many possible questions! The age of the universe, let alone humanity, let alone modern era, is way too short to ask them all.
It is impossible to find the best one, but here is a random question I have never been asked:

> What is the sum of all natural numbers that are less than 8374532496994564053453 and are divisible by 31, except for the first five?
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