Guess what’s not a question. It’s this headline on the home page of Yahoo! TV:
That’s an imperative sentence starting with guess, which is a command to the reader, not a question.
Guess where the mistake is on the home page of Yahoo! Movies.
It’s that question mark at the end of an imperative sentence.
There are four kinds of sentences: One is the declarative sentence. Do you know what an interrogative sentence is? Tell me what an imperative sentence is. That’s not an exclamatory sentence!
Guess! Who thinks those are questions?
The writers/editors who work on the Yahoo! front page. Guess who’s wrong. The writers/editors who work on the Yahoo! front page. The two headlines that begin with Guess are imperative sentences, not interrogative sentences.