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

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?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What time is it when an elephant sits on a fence?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

What runs around the whole yard without moving?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?