Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

I travel all around the world but always stay in the corner. What am I?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

How could a baby fall out of a twenty-story building onto the ground and live?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

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

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

What always comes into a house through the keyhole?

Can you identify if it's a murder or a suicide ?