Yes. Mathematics is 510-519, not even close to the entire 500's. You could argue "Math and science" should be acceptable, but just "math" is not correct.
Music is just the 780's. If that were accepted, it would only be fair to accept Architecture, Painting, Sculpture, Photography, Sports, and Games as well.
Never heard of the dewey decimal system. Luckily I was on laptop for a change and saw the picture, so I figured it might be book genre. but it took me forever before I had a hit... tried horror detective suspense scifi, then science fiction gave me pure science ( another term that is new to me.) It took so long before I got some answers and they were few and far between. Managed to get 6 right in the end, literature wasnt one though haha