How many times can you subtract the number two from the number fifty?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Replace the question mark in the picture below.

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'