I've just done all three of this series back to back and it was only on this final one that I realised naming the art work rather than the artist was an option, because of the Little Mermaid.
Girl with balloon should be accepted. I'd say it is the most common name for this piece (wikipedia agrees: https://en.wikipedia.org/wiki/Girl_with_Balloon )
Banksy's girl with balloon just got shredded...after selling for $1 million plus..and went up in value,....then some other idiot shredded his own Banksy and value went from $40K to zero !!!
I love that train painting, but couldn't have told you who made it or what it was called. That said, I'm pretty proud to be one of 9% who knew "Nude Descending a Staircase".
I guess I thought it was pretty straightforward, no arguments like with the geography one. So i missed you could name the work itself aswell..
I actually only got the painting by Raphael because I figured I would try the other ninja turtles.