The man in the Elevator
A man lives on the tenth floor of a building. Every day he takes the elevator to go down to the ground floor to go to work or to go shopping. When he returns he takes the elevator to the seventh floor and walks up the stairs to reach his apartment on the tenth floor. He hates walking so why does he do it?
The man is too short to reach the number 10 button.
An alternative solution: The elevator only runs to the 7th floor. The riddle did not state that he takes the elevator from the 10th floor in the morning, just that he takes the elevator to the ground floor. He walks to the 7th floor each morning to take the elevator to the ground floor also.
Another alternative solution: The man does it because he needs to go to work to get money and then go shopping to get food to eat.