Can it be possible to build a house that has all its four walls facing towards the South?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

I have Rs.50 and I spend it in the way as below.

Eight of us go fourth, not back, to protect our king from an attack. What are we?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Can you name four days which start with the letter 'T'?

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