Brain Teaser: Rule the World!

mental_floss Blog � Brain Teaser: Rule the World!:

"It’s late at night, you’re working on a report, and you’ve got to sketch some reasonably-to-scale diagrams. But for the life of you, you can’t seem to find a ruler or a yardstick to indicate inches. What to do, what to do?

With two standard sheets of typing paper, you can create a fairly accurate ruler that will measure inches and feet. The question is… how? See if you can figure it out, then visit Page 2 of this post to see if your solution matches ours."