My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

What jumps when it walks and sits when it stands?

Can you place six X (crosses) in below board without making three in a row in any way ?

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

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What is the word or phrase below?
R | E | A | D

Can you find a five letter word that is left with only two letters if one is removed?

Replace the question mark with the correct number in below Picture:

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?