I’m often asked “Where do you get those funny photos for your blog?”. I often reply “I’m at the point where those pictures find me.”
Case in point: Three different people whom I know only via the internet gave sent me a copy of the image below:
Two of them added “You were a math guy in school, right? How does this work?” One of them threw in “OMG” and “WTF” for good measure.
I’m a little short on time today, and formatting math problems for a web page is a bit of a pain, so I simply did the math by hand on paper and scanned it:
I hope this explains things. If not, let me know in the comments and I’ll go into more detail tomorrow.