It’s understandable, though. Hard facts and specific dates are tricky to memorize. And unless you’re applying this knowledge to your life, you probably don’t think about it. Tap or click to see how well you know U.S. geography. But if you pride yourself as a trivia champ or a Jeopardy whiz, then this stumper of a quiz will be the perfect challenge for you. It covers subjects ranging from science to history, and it even stumped several of our writers here at Komando.com. Think you have the smarts to get all the answers right?

How much do you know about everything?

This general knowledge quiz from Playbuzz isn’t your ordinary online test. It covers a broad range of topics including science, art and biology. This 15-question quiz may seem tricky, but the answers are multiple choice. So if you don’t know an answer, pick your best guess and see if you stumble onto the right answer. By the end of the quiz, you might just learn something new. Are you ready to stretch your brain to the limit? You can click the link above to take the test on Playbuzz, but some of the ads look like they’re part of the quiz. If you’d rather not chance it, here are the quiz questions. You can find the correct answers at the end of this article.

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How do you think you did? Compare your answers to see how many you got right.

The answers:

SandSahara DesertThe EgyptiansMembrane6ArgentinaThe Great Barrier ReefRodinIsaac Newton1918SwedenCyprusSkinGreeceJapan

If you’re up for more quizzes, try this privacy quiz with a twist. Tap or click here to get friendly with the Privacy Chicken.