How many times can you watch rented movies on an iphone?

How long do I have to watch a rented movie from iTunes on my iPhone 5? And can I watch it more than once?

You have 30 days from the time of rental to watch your movie, and 24 hours (in the US) or 48 hours (elsewhere) after you've started viewing to finish it. Once the rental period expires, the movie will disappear from your iTunes library.

How many oreos can you eat in one sitting? Whatever the answer is, its the same number