Most people have an above-average number of arms.

You might think the odds are 23 out of 365 or something, but nope — it's just over 50%.

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Granted, it's not actually possible to fold a piece of paper in half that many times. But if you could, 45 folds would bring you to the moon. That's the power of exponents, y'all!

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There are 8 × 10^{67} possible ways to shuffle a deck of cards — that means there are more ways to shuffle a deck than there are atoms on Earth. Most possible card sequences have never been shuffled before, so every time you play Go Fish, you're likely to make history.

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And a trillion seconds? 31,709.8 years.

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I'll let you do the math on this one if you don't believe me, but here's a hint: Area = πr^{2}.

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Your brain doesn't always interpret geometry correctly! Scientists have attributed this common misconception to a phenomenon known as "size constancy."

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Size constancy strikes again!

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Since some people have no arms or one arm, the average number of arms a person has is somewhere just under two. So if you have two arms, you've got more arms than average.

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Your brain can only contain so much info, and Graham's number has more digits than any human brain can hold. According to a physicist from the University of California, Irvine, trying to store all of Graham's number in your brain would turn it into a black hole.

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There are more digits in a googolplex than there are particles in the whole universe.

This works with any percentage. Seriously, try it!

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Now, we're talking probability here, NOT biology. From a biological perspective, it's a 50-50 shot, like you'd probably assume. But in terms of mathematical probability, there's a two-out-of-three chance the other kid's gonna be a girl. Numbers are cray!

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Yep, just 6.28 extra feet of rope will give you an extra foot of clearance across the entire planet.

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No matter the size of the ball, the answer will always be 6.28 feet, or 2π.

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It's a mind-bending geometric paradox.

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You know how the people you follow on Twitter tend to have more followers than you do? That's a real mathematical phenomenon called the "friendship paradox," and it's true for real life, too.

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Z is the radius of the pizza and A is the height.

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