This is really a tough one!!! In the image, there are 12 people initially. After it moves, there are 13!! How did the extra one come in? Tried a lot to solve this, but could not. Can anyone tell?
I had to spend 15 minutes thinking about it myself, and then I just gave up and googled it. Here's what I got. It sort of makes sense now. http://www.laurenceholbrook.com/main_00000e.htm But I will leave you with this.
Content Maestro please keep that information to yourself, on that way you can have infinite amount of chocolate. I'm eating my infinite chocolate at the moment.