What is the Surname of Barbie Doll?

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

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Which fur should we be getting from the Lion?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Which is the rope you never skip with?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?