QUIZ: Are you one of the 2.5 billion? #WorldToiletDay

More than 2.5 billion people around the world suffer from improper sanitation. In honor of World Toilet Day, we can determine if you're one of them by this simple quiz. Take it and see.

QUIZ: Which tunnel boring machine are you?

So Buzzfeed won't create our buzzquiz ideas. No biggie. We made our own. Just scroll down and click "Let's Play!" to get started.