You can see it everyday, But cannot touch it at will. What is it?

In the four images below, can you find the odd one out?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

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?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Imagine you are in a room with no windows or doors. How will you get out?

What number comes next in this sequence:
7 8 5 5 3 4 4 _