Alternative:

1. A fish weighs 10 pounds plus half its weight. How much does it weigh?
2. A pen and a bottle of ink cost $1.10. The pen costs exactly $1.00 more than the ink. What does each cost?
3. Queso Cabesa is both the 50th best and the 50th worst student at his school. How many students attend his school?
4. When does 1+1+1=1?
5. All but two of a woman's sons have blue eyes. All but two have brown eyes. All but two have green eyes. How many sons does she have?
6. An exclusive new club makes you answer a riddle to enter. Tim wants to get inside, so he watches the people in front of him in line, as the security guard asks the riddle. To the first guy in line, the guard says, "Six."  The man answers, "Three," and he is allowed to enter.  To the next person, the guard says, "Twelve."  The woman answers, "Six," and is allowed to enter. So Tim thinks he has it figured out, and walks to the door. The guard says, "Four."  Tim says, "Two," but he finds that denial is not just a river in Egypt.  What should Tim have said?