How many sharps do the following key signatures have?

C major has none.

G has one (F#).

D has two - F# and C#.

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How many sharps do the following key signatures have?

this question is for musically experienced people. I need to know how many sharps the following key signatures have:

C Major

G Major

D Major

Thanks so much =)

This can often indicate atonality from composers, especially those you mention in your question. No use of a key signature doesn't restrict a composer to that home key and gives them more freedom to explore tonality(ies) and progressions. It also can prove to be hell for some music theorists because of the ambiguity (see: Tristan Chord). Secondly, if they DO pick a home key for their composition, but decide to modulate until the last few measures of the piece, it would prove to be a visual assault of accidentals upon the performer. In cases such as those, it's easier to not indicate a key. A composer decides on accidentals because of our standard music theory practices regarding progressions and tonality--sometimes the use of a sharp or flat, even if the note is the same (ex: E-flat/D-sharp) can alter the meaning of a chord and the music's progression altogether. As our world of music has progressed since the 20th century, composers are daring to explore outside of our western music theory boundaries and breaking "the rules." This is the best explanation I can offer you without diving into mindless jargon. I hope that helps. EDIT: In response to your edit... Deciding to use a C-sharp or D-flat relates to the key signature and the chords/progressions desired. Let's say you want to play in the key of G-flat major. You decide to modulate to the dominant of the key ten measures later....if you use a C-sharp in place of D-flat as the root, while it sounds dominant, is not actually V of G-flat major when analyzed.

C major = no sharps or flats

G major = 1 sharp...which is F#

D major = 2 sharps...Which are F# and C#

C Major= no flats no sharps

G Major=one sharp which is f#

D Major=2 sharps which r f# and c#

C= no sharps, no flats

G= one sharp; F#

D= two sharps; F# and C#

These other two answers are correct!!

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