I created this riddle. So be gentle!
I was sitting at a bus stop waiting for a bus.
Across the street there was an old woman
who was waiting on her bus.
There are only two buses that run.
The bus that runs north, and the bus that runs south.
There are twenty blocks between the north terminal to the south terminal
The buses do not make blocks. It travels from one terminal to the next terminal.
Taking turns being the north and south bus.
The south bus arrives and the old woman gets on.
Just as her bus leaves the north bus arrives, and I get on.
I find a seat, and noticed the old woman was on my bus.
Can you tell me how she did it?
Please explain your answer, or theory!