Others Maths Puzzle

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.
What painting will the artist hang on the wall at 9:20?

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Others Other Question

A frog is at the bottom of a well 10 feet deep.
He can jump 3 feet, but every time he jumps 3 feet,
he falls back 2 feet.
How many jumps will he have to make to get out of the well?
Distance between A and B is 80 kms. A bus left A at constant speed towards B.30 mins later car left from A to B. Car overtook the bus in 30 mins and continued towards B.With out stopping at B, the car turned back and again encountered the bus 80 mins after car had met bus earlier. Find Speed of bus?