What happened when the wheel was invented?

Why is Saturday stronger than Monday?

Can you decipher the below rebus?

PBLUESAISNUERSES

I make two people out of one. What am I?

What is red and smells like blue paint?

Why Aeroplane windows are round?

A dead body is found outside a multi-story multinational company. The case is reported and a homicide detective is called on the crime scene.

He looks at the body and then towards the building. From the position of the body, it is evident that the victim committed suicide. He goes to the first floor of the building and then walks in the direction of the dead body, opens the window and toss a coin in the air.

He goes to second floor and again repeats the process. He keeps doing this till he is done on all the floors. Then he returns back to the floor and tells his team that it is a murder.

How in heaven did he deduce that?

How can you take 2 from 5 and leave 4?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

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