You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

The answer I give is yes, but what I mean is no. What was the question?

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

By moving just one matchstick, you need to make the below statement true. Can you do it?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?