The answer (which can be discussed further) is TFFFFTFTTF.

1) TRUE. The Church Organ IS a wind instrument that produces sound because of the passage of air through pipes, and because the piano has its key struck by hammers, it IS a percussion instrument. http://www.innovateus.net/content/there-difference-between-piano-and-organ

2) FALSE. New pianos needs the same (or more) number of tunings as older pianos. Piano strings have very high tension on them, and they just plain stretch as time passes. Hence, the need for tuning. http://www.betterpianoservice.com/how_often.html

3) FALSE. As of this writing, the world record for most number of people playing simultaneously on a piano is 21. Take a look at this feat achieved earlier this year in March: https://www.youtube.com/watch?v=WR3e71OO1tY

4) FALSE. Pianos by the original inventor - Bartolomeo Cristofori, were based on harpsichords. Cristofori's earliest pianos carried this same colour scheme: black naturals, and white sharps. You can read about it here: https://www.quora.com/Why-were-the-colors-of-the-piano-keys-reversed-in-...

5) FALSE. The piano does have 88 keys, but it has more than 88 strings. The treble pitches of a piano have three unison strings, the tenor range uses two unison strings, and the bass strings use only one string. The end result is that for 88 notes, there can be as many as 236 strings. http://www.piano.christophersmit.com/strings.html

6) TRUE. This statement is true; there are four types of vertical pianos: spinet, console, studio, and upright. https://www.linkedin.com/pulse/whats-difference-between-types-vertical-p...

7) FALSE. This part is true - Pythagoras the mathematician was credited as the person who discovered the perfect interval. However, the ratio of the perfect interval is 3:2, not 2:1. http://www.phys.uconn.edu/~gibson/Notes/Section3_2/Sec3_2.htm

8) TRUE. Not all pianos start on a very low A key. Bösendorfer pioneered the extension of the typical 88-key keyboard, creating the Imperial Grand (Model 290), which has 97 keys (eight octaves); this piano starts on an ultra-low C. Listen to the "Imperial" bass keys here: https://www.youtube.com/watch?v=bIOQ2Fwto8k

9) TRUE. Una corda (or rarely due corda) is used to signify that the soft pedal should be depressed. The leftmost pedal in a piano is usually the soft pedal. https://en.wikipedia.org/wiki/Soft_pedal

10) FALSE. ThePiano.SG website was officially launched on 8 Aug 2014. The answer to this can be found on this page: https://www.thepiano.sg/about-us