What always comes into a house through the keyhole?

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 ?

How is a fly different from a mosquito?

In the four images below, can you find the odd one out?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

What is the riddle which can be asked all day with a different correct answer each time.

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

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