When something is rhetorical that means it is made for style or effect, likewise a rhetorical question is a question that is asked for mere effect, rather than a question that needs to be answered. Questions like “Who knew?” or “Who's better than me?” are often rhetorical. If someone asks a question when they actually do want an answer but they are not getting any response, you might hear them say, “It’s not a rhetorical question; I want an answer.”