what does this picture(rebus) riddle means ?

How many sides does a circle have?

What does this rebus riddle means ?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What does an Island and the letter T have in common?

What is the end of everything?