9 3 1 2 ?
Chat with our AI personalities
A number is not a form of punctuation, it would become confusing to people to add numbers as punctuation. Therefore none of the numbers should replace the question mark
If this is an algebra question, then you need to give an open sentence with a question mark in it. You might be asking about the ASCII code: ? is 63 (decimal)
2
?
A quotient or a ratio. It would help to have a proper question instead of a half formed sentence with a question mark stuck at the end!