Haha, crafty! 500 words difference seems like a lot, I'm surprised they weren't suspicious!We had an assignment for English before.
I had 1500 words that I wanted to present as being 1000. I made the margin very narrow, and size text 10.
I ended up getting 14/15, with the comment "Chris! This was great but it would've been better if I didn't have to use a magnifying glass to read it."