Just as G sharp is one semitone above G, and G double sharp is two semitones above G, G quintuple sharp can be found five chromatic semitones--equal in twelve-tone equal temperament to a perfect fourth--above G natural. G quintuple sharp is enharmonic to A triple sharp, B sharp, and--most notably--C, as well as D double flat, E quadruple flat and F quintuple flat.
On a piano, this note can be played by striking the white key immediately on the left of a pair of black keys.
Triple sharps, triple flats, quadruple sharps and the such are very rarely encountered, and so the inability to play a quintuple sharp on the piano will not severely disadvantage one. Wherever did you come across this one?
Anything beyond a double sharp exists only in theory and not in practice. A quintuple sharp would raise a note by 5 half steps, so a C with 5 sharps would sound the same as F.
F would be C quintuple sharp.
No
A flat
Look on this picture http://musicianinyou.com/resources/Piano%20Keys.GIF
A G quintuluple sharp would be raised four half steps, or two whole steps, making it a B.
Anything beyond a double sharp exists only in theory and not in practice. A quintuple sharp would raise a note by 5 half steps, so a C with 5 sharps would sound the same as F.
F would be C quintuple sharp.
Ab
No
A flat
Look on this picture http://musicianinyou.com/resources/Piano%20Keys.GIF
Its a kind of note in music. Its also in the G-scale of g sharp it is on the grand staff on piano.
To the left, G natural. To the right, A natural (on a piano keyboard).
Okay, there are 88 keys altogether. 88-36=52!
if you are talking about notes: c c sharp/ D flat d d sharp/ e flat e f f sharp/ g flat g g sharp/ a flat a a sharp/ b flat b etc...
g sharp would be g sharp or a minor. d sharp would be d sharp or e flat. a sharp would be a sharp or b flat. c sharp would be c sharp or d flat. f sharp would be f sharp or g flat. e sharp would be e sharp or f slat for which there is no such note. and g natural would be g natural.