What is the Surname of Barbie Doll?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

Imagine you are in a room with no windows or doors. How will you get out?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

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

Why do you find that most of the buildings are deprived of the 13th floor?

I have teeth but i don't bite. Who Am I ?

Look at the picture and find out which square is not linked with any of the other squares.

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?