Here are 15 examples of interview questions Google uses for their interviews.
http://www.businessinsider.com/15-google-interview-questions-that-will-make-you-feel-stupid-2009-11#how-many-golf-balls-can-fit-in-a-school-bus-1
http://www.businessinsider.com/15-google-interview-questions-that-will-make-you-feel-stupid-2009-11#how-many-golf-balls-can-fit-in-a-school-bus-1