Seriously, you have to be living in a hole all your life, get no further than the 3rd grade, and have an acute case of retardation to get these answers wrong. Either that or this was staged, or they were all joking. I'm pretty sure these are a select few from the hundreds they probably interviewed for this segment:
http://www.youtube.com/watch?v=fJuNgBkloFE&eurl=
http://www.youtube.com/watch?v=fJuNgBkloFE&eurl=