Why Aeroplane windows are round?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Can you find the key in the picture below?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

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

Can you spot the man between the coffee bean in the picture below ?

Give it food and it will live; give it water and it will die.

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?