True, but test passes! :D

True. Although probably not important for the 8th kyu. Thanks :)

This solution mught give incorrect result in case multiplication overflows

Use spoiler flag next time, please.

Thanks)

It collects the range 0 to n (exclusive) in its return type, a Vec<u32>.

Here's a more explicit example:

return (0..n as u32).collect::<Vec<u32>>();

Does that answer your question?

Please explain how it works