I moved on again.
"Hallo," said a voice. "I saw you get out. How many did you make?"
"None," I said wearily.
"How many?"
I went and sat down next to him.
"Guess," I said.
"Oh, I can't."
"Well, think of a number."
"Yes."
"Double it. Divide by two. Take away the number you first thought of. What does that make?"