G major
How many sharps/flats and which ones?
1 Sharp (F#)
F major
How many sharps/flats and which ones?
I Flat (B flat)
D major
How many sharps/flats and which ones?
2 Sharps (F# and C#)
C major
How many sharps/flats and which ones?
0 Sharps or flats
A major
How many sharps/flats and which ones?
3 Sharps (F#, C#, and D#)