Changjiang business school admission exam logic questions:

Changjiang business school admission exam logic questions:
If an 80-year-old boy cannot afford a house, the girl after the 80-year-old can marry a 40-year-old man. If a man is qualified after the 80 s, it is also a good choice to marry a girl aged 20 at the age of 40...

On the first floor, I replied: at the age of 40, I found a young and beautiful 20-Year-Old girlfriend who went to her house to meet my parents. I opened the door to my first girlfriend who had been in college for several years. The new girlfriend shouted: Mom ~
[2 Floor] added: when her mom saw me, she was shocked and took a breath. I did not wait for my response, and then pulled my daughter into the room and said to her, "You cannot be with him. He is your own father !"
[Third Floor] continued: Female: I already have his flesh and blood ......
On the 4th floor, the girl's 60-year-old
When my father came out and saw the girl's boyfriend, he whispered to him: "Why did you come, didn't your mother and your living expenses be paid on time every month?
[5th Floor] "ding dong", the girl's boyfriend's mother came to see her. Seeing the girl's father: "Why are you ..."
On the 6th floor, my girl's boyfriend's father stops and goes upstairs. As soon as she sees the girl's father, she immediately enters the door: "Aren't you my brother who has been lost for many years? "
On the 7th floor, the girl's mother saw her boyfriend and mother: "Mom! "
[8 th floor] when the girl's mother saw her boyfriend and his father, she shouted "Dad !", Fainting immediately

1. How many floors do you understand?
2. What is the name of his mother's father when she sees his mother's girlfriend?