Replace the question mark with the correct number in the below-given picture?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

Why Wine Glass Stem is so long?

What is harder to catch the faster you run?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you replace the question mark with the correct number in the below table sequence?

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

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?

Who is that with a neck and no head, two arms and no hands? What is it?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?