I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What has one letter and starts with an E?

There is a family that live in a round house. The two parents go out for a movie and leave a babysitter to watch their son. They come back and the kid was not there. Some one kidnapped him. The maid said she was cleaning in a corner. The cook said he was making pizza. The babysitter said she was getting a board game. Who kidnapped him.

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

how come the second man dies?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What is wrong in the below Picture?