A: (here is an example of a question mark (?) to make a statement with a question mark you must be asking a question for example: "Is this BRAINLY?" that would be the proper use of a question mark. You may also use it if your not sure of something. Example: "Sir, are these cupcakes $1.50?" Questions mark main use is to ask a question. That is why the question mark, is called a question mark.
I hoped this helped you understand question marks.
