I am trying to get my head around this and I'm not sure what I'm missing. In a C maj scale, the fifth is a G. If you count down, descending, the G is a fourth. Am I OK so far? My teacher told me that this would be the inverse. (I think he said inverse) He said that the sum of the two would always be 9. (4+5+9) So the third would be an E and is also the sixth descending. I find this confusing because it seems that a note can be two different degrees depending on whether you are ascending or descending. So, do you speak of degrees as either ascending or descending. Or is this just a bit of trivia that isn't really used. If it is useful, how is this used? Also, does this all relate to the circle of fifths, which I see referred to as circle or cycle of fourths or fifths. I would ask my teacher but we are on hiatus and will start back up in 2 weeks.