Answer:
What goes up and never comes down?
In 1990, a person is 15 years old. In 1995 that same person is 10 years old. How is this possible?
There were 5 children in a room. Iris drew a picture, Barry played video games, Andrew played chess, and Trina read a book. What is the fifth child, Mindy, doing?
What is the building that you leave without ever having entered.
What can I not be tomorrow?
What sphinxes employ and players enjoy.