We solved many riddles and left even more unsolved. DO YOU THINK
     riddles are easy ? Try to solve some of them - WE bet you won't solve
     much.
        1. When I am clean, I am black. When I am dirty, I am white.
           What am I ?
        2. If you throw a green shoe into the Red Sea, what does it become ?
        3. What belongs to you, but is used most by others ?
        4. What question can you never answer "Yes" to, even if it's true ?
        5. What's the difference between a locomotive engineer & a school-
          teacher ?
        6. Which letter surrounds Great Britain ?
        7. What goes from New York City to Boston without moving ?
        8. What has to be taken before you can receive one ?
        9. What is as light as air, but hard to hold ?
       10. Why is it easier to wash a mirror than a window ?