Answer:
You draw a line. Without touching it, how do you make the line longer?
What is the building that you leave without ever having entered.
First I threw away the outside and cooked the inside then I ate the outside and threw away the inside. What did I eat?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
When can you add two to eleven and get one as the correct answer?
What is round, has a twin, and sees more than most?