Complete the table series riddle by finding the number that can replace "??".

My location can be determined by the below rebus.
So where am i ?

What always comes into a house through the keyhole?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I have feet, but no legs. Which animal Am I?

They are three errirs in this question. Can you find them?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

The more it dries, the wetter it becomes. Can you tell what it is?

The dirtier I get, the whiter I look. Who am I?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?