Answer:
What can travel around the world while staying in a corner?
Why is it so easy to weigh fish?
A doctor and a bus driver are both in love the same woman. The bus driver had to take a trip for a week. Before leaving he gave the woman seven apples. Why?
Which bus could cross the ocean?
When is it bad luck to see a black cat?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.