Riddle: A man lives on the 25 floor of an apartment. On rainy days he takes the elevator all the way to the 25 floor. On sunny days he goes up on the elevator 10 floors and then takes the stairs the rest of the way up. Why does he only take the stairs when it's sunny?
Answer: He only takes the elevator on sunny days because he is a little person. On rainy days he has his umbrella and can reach the botton for the 25 floor. On sunny days he doesn't have his umbrella so he can't reach the botton for the 25 floor, he can only reach the botton for the 10 floor. So, he has to take the stairs for the other 15 floors.