What can go up a chimney down, but can’t go down a chimney up?

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?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

Do You See It?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

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

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day