What is the Surname of Barbie Doll?

What does a man do only once in his lifetime, but women do once a year after they are 29?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

You need to move three matchsticks to form three squares. Can you do it?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you spot the man between the coffee bean in the picture below ?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

What word is pronounced the same if you take away four of its five letters?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?