Which is the correct shadow of the bird?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

If you say my name, I will no longer exist. What am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

There is something which you can be arrested for attempting but not for successfully completing.

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.