What is both possible and impossible at the same time?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Out of four images which one is the odd one out?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

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?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

Solve the mathematical equation in the picture below.

I know a nine-letter word having only one vowel.
Do you ?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?