What does this Rebus Picture mean?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Which number should replace the question mark?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

What does this below rebus puzzle mean?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?