I studied history in college and get the joke.

Your much better at math than I am then. I can write 40 page theses but the second I'm given a math question more complicated than simple algebra my brain shuts down

I wouldn't want to read the thesis of someone who doesn't know "your" from "you're".

Well I take a bit more care when I'm writing a thesis than when I write a quick comment on the internet.

It's actually not Zeno's paradox, its related, but not it. It's actually just a simple mathematical principle called a Taylor series. 1 + 1/2 + 1/4 + 1/8 +1/16 + ... = 2. Or if you want to get real mathy here 1 + 1/x + 1/x^2 + 1/x^3 + 1/x^4 + ... = 1/(1 - 1/x) works for all x greter than 1

I might be taking a troll's bait, but its Zeno's Paradox. you want to travel 1 meter, so you take a step that is half-way there. Then you take another step that is half that. Then another step that is half that. Theoretically, you will never go the full meter. You will go 0.9999999999999etc meters. The mathematicians are applying this principle to the 2nd beer, halfing the amount each time. The bartender, being a lot more practical, just pours the complete damn beer.

No I seriously don't understand since I'm utterly horrible at math, thanks for explaining it to me.

Each guy ordered half of what the last guy ordered. The bartender put 2 cups. One was for the first guy. The second one was for everyone else. The reason why is because they infinitely take half of the prior order, which will be less than 1; so the second one is just how much beer is ordered rounded up.