Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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

My location can be determined by the below rebus.
So where am i ?

I have branches, but no fruit, trunk or leaves. What am I?

Solve the following series:
AZ, GT, MN, __, YB

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?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

Solve the rebus riddle in the picture below.

Jim has three close friends at his school: Michael, John and Alice. Two of them play football, two play basketball and two play hockey. The friend who does not play hockey does not play basketball as well. The friend who does not play football does not play hockey.

Can you identify which sport/s is played by which person?

Can you name some countries which do not have the alphabet 'A' in them?