What painting will the artist hang on the wall at 9:20? In the Art Gallery is a new conceptual art piece. The artist created a huge pile different
paintings; periodically he picks up one of the paintings and hangs it on the wall, and adjusts it. At 11:00, the painting titled "Number 30" was hung. At 4:00, the painting titled "Number 240" was hung. At 7:30, the painting titled "Number 315" was hung.