What is the Surname of Barbie Doll?

Can you move 2 matchsticks to form four equal sized squares.

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

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

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

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

People make me, save me, change me, raise me. What am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?