Which alphabet letter is a question?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

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

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What kind of band never plays music?

John was piloting a plane behind a car but was never able to overtake it. Why?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What does below pictogram mean?