G major (F♯)
D major (F♯ and C♯)
A major (F♯, C♯ and G♯)
E major (F♯, C♯, G♯, and D♯)
B major (F♯, C♯, G♯, D♯ and A♯)
F♯ major (F♯, C♯, G♯, D♯, A♯ and E♯)
C♯ major (F♯, C♯, G♯, D♯, A♯, E♯ and B♯)
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
G Major or e minor. The sharp would be F sharp.
No key signatures contain only those three sharps. With the A-sharp, it could be the keys of B major, F-sharp major, or C-sharp major (or any of their relative minor keys).
Both G major and e minor have F# in their key signatures. For e minor, the 7th note (D) is raised (to D#) when it is in harmonic form.
The key with three sharps is A major, however A major uses C sharp - alongside with G sharp and F sharp - instead of D sharp.
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
G Major or e minor. The sharp would be F sharp.
No key signatures contain only those three sharps. With the A-sharp, it could be the keys of B major, F-sharp major, or C-sharp major (or any of their relative minor keys).
D major or it's relative minor (B minor). I memorized the "Circle of 5th's" to help me remember key signatures. There are many key signatures with F and C sharps. D, A, E, B, F#, C# and their relative minor scales (Bm, F#m, C#m, G#m, D#m, A#m).
There are several key signatures that contain sharps.
Both G major and e minor have F# in their key signatures. For e minor, the 7th note (D) is raised (to D#) when it is in harmonic form.
The keys of Eb Major and c minor have three flats in their key signatures: Bb, Eb, and Ab.
There are three keys which are called "enharmonic keys", the three enharmonically equivalent key signatures are B major/C-flat major, F-sharp major/G-flat major, and C-sharp major/D-flat major and likewise their relative minors. B/C-flat, F-sharp/G-flat and C-sharp/D-flat all share the same pitch but are just notated in two different ways. In an other way the keys mentioned above are just one key going by two different names but they use different accidentals and are written on different lines/spaces.
There are five key signatures with G sharp, they are: A major/F♯ minor (3 sharps) E major/ C♯ minor (4 sharps) B major/G♯ minor (5 sharps) F♯ major/D♯ minor (6 sharps) C♯ major/A♯ minor (7 sharps)
F major, B-flat major.
The key with three sharps is A major, however A major uses C sharp - alongside with G sharp and F sharp - instead of D sharp.
15 different key signatures exist. (no sharps or flats) = C major F sharp= G major F C sharp = D major F C G sharp = A major F C G D sharp = E major F C G D A sharp = B major F C G D A E sharp = F # major F C G D A E B sharp = C# major B E A D G C F flat = C flat major B E A D G C flat = G flat major B E A D G flat = D flat major B E A D flat = A flat major B E A flat =E flat major B E flat =B flat major B flat = F major