Hiya, I've been reading up on the methods for working out intervals, and I think I've got it - but the only way to tell is to set myself some questions. So I randomly picked some notes, and tried to work out the intervals. Would a kind soul mind "marking" what I came up with.
C -> G# - Aug. 5th
D -> F - Min. 3rd
E -> Ab - Dim. 4th
A -> G# - Maj. 7th
A -> G - Min. 7th
Then I tried starting on sharps/flats
Bb -> F - Perf. 5th
C# -> E - Min. 3rd
Thanks in trepidation