Am I right about the meaning of "what a question"?
A - Do you mind if I read your book?
B - What a question! (Of course I don't!); (Sure!)

Thank you in advance!

Question

Am I right about the meaning of "what a question"?
A - Do you mind if I read your book?
B - What a question! (Of course I don't!); (Sure!)

Thank you in advance!

Answer

The suggestion is, "What a (silly) question!", so your understanding of "of course/sure!" is spot on. :)