Find out the missing number in the picture attached:

What is the Surname of Barbie Doll?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Why do people go to bed?

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

How can you take 2 from 5 and leave 4?

Can you make four (4) nines (9) equal 100?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?