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What Constellation Is Your Soul?

play.howstuffworks.com/quiz/what-constellation-is-your-soul

There are a total of 88 identified constellations, so which one of them represents your soul? Take this personality quiz to find out what stars your soul resides in!

¿Podrías aprobar un examen básico de física?

play.howstuffworks.com/quiz/can-you-pass-a-basic-physics-test-spanish

No te preocupes, este examen no te pondrá a prueba en física cuántica y teórica, sino solo en las cosas divertidas del mundo real que son la base de todo, desde la aviación hasta el béisbol y el boxeo. ¡Prepárate para mostrar tu habilidad con la ciencia ahora!

Can you ace this 5th grade math quiz?

play.howstuffworks.com/quiz/can-you-ace-this-5th-grade-math-quiz

For must of us, 5th grade was a long time ago. Mental math gets fuzzy and how to solve for X is a distant memory. But the concepts are pretty basic ... right? See if you're a math buff with our 5th grade math quiz!

Do you know which of these is bigger?

play.howstuffworks.com/quiz/do-you-know-which-these-is-bigger

We live in a world filled with things of all sizes. Some things are super-sized -- other things are simply teeny. Can you pick which of the following is bigger?

What Mineral Are You?

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There are hundreds of minerals out there, but which one are you? If you would like to find out, then you should take this quiz!

Test Your Knowledge Of Geometric Shapes With This Quiz!

play.howstuffworks.com/quiz/97-people-cant-name-these-geometric-shapes-can-you

As we moved from kindergarten to high school, we learned about the different shapes, but how well will you be able to identify them from a picture? Let's find out!

If You Pass This Difficult Mental Math Quiz, We Think You Deserve a PhD!

play.howstuffworks.com/quiz/you-pass-this-difficult-mental-math-quiz-you-deserve-a-phd

So you're a math whiz, are you? Let's put that to the test with this wickedly difficult mental math quiz that spans a range of questions!

98% of People Can't Ace This Human Biology Quiz. Can You?

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Did you know that your brain is more active in the evening and at night, while you're sleeping, than during the daytime? It's true -- that's when it does it most work. Let's see how much you know about basic human biology, and debunk some myths about all the things going on inside you without your knowledge right now.

Can You Identify These Venomous Snakes?

play.howstuffworks.com/quiz/50-out-55-people-cant-identify-these-venomous-snakes-can-you

Knowing sequences of colors and patterns can help you tell the difference between dangerous and benign snakes. Your life may depend on it! Take this quiz to see if you can identify these venomous snakes from a single image.

No One Can Live Without a Mesentery, But What Does It Do?

health.howstuffworks.com/human-body/parts/mesentery.htm

In 2017, scientists discovered the 79th organ of the body. What took them so long and what does it do?

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