"Outside the city" vs. "outside of the city". The second version sounds better to me, though they have the same meaning.
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FakakiThanks so much for your answer.Does that apply to "inside vs. inside of" as well?Sincerely,TonyYes.
FakakiAre outside and outside of interchangeable?For some people. The "outside of" wording is wordy http://dictionary.cambridge.org/dictionary/british/wordy and unnecessary.