Some Even Lower-Level Humor...How Far Down Can This Go!

Question: What sort of computer did Isaac Newton use?
Answer: An Apple.

Question: What is the value of product (x-a)(x-b)(x-c)...(x-z)=?
Answer: 0....see why?

Jeopardy Answer: 9W.
And the Question: Do you spell your name with a V, Wagner?

Question: What does a hungry mathematician like to eat?
Answer: A square meal