It looks as if HR is getting more savvy to interview questions and are rapidly changing these questions in order to see if you can think outside the box. Personally, I believe the purpose is to throw the interviewee off guard. How some one responds to a bizarre question often speaks volumes on their personality traits and how they handle stress and unexpected events.

Q:You're a pencil trapped inside a blender, how would you get out?

Q: If you could be a superhero, what would you want your superpowers to be? Be careful here not to be gender sensitive.

Q: How many ridges are on a quarter?

Q: An apple is 20 cents, an orange is 40 cents, and a grapefruit is 60 cents. How much is a pear?