Guys what is the name of this artworks?

I'm sorry but I don't know what the first one is. I can, however tell you what the second and third images are. The second one is obviously the Mona Lisa and the last one is called the Discobolus

Explanation:

I hope this helps :)

frederick the great, king of prussia was a general

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.