What runs around the whole yard without moving?

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

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

O T T F F S S ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

Which is faster, Heat or Cold ? Explain.

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

If an electric train is travelling south, then which way is the smoke going?