We use some form of code every day in everything we do. We abide by codes of conduct and even use a form of code when we speak with others. But did you know there are some codes that have been around for thousands of years and remain unsolved? Here are eight that have stumped "cryptanalysts," or codebreakers, for years.

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Every engine has something called a carburetor. Most people know they can be expensive to repair but don't truly understand what their purpose is. What carburetors do is pretty amazing. It’s almost magical.

Math isn't everyone's favorite subject, and for good reason. Some equations are so difficult, even the best mathematicians can't solve them. But there are math problems that, on the surface, seem pretty basic yet remain unsolved. So, what makes them nearly impossible to figure out?

Naps are one of life’s great pleasures. Laying down on a Sunday afternoon and dozing off while watching TV is sheer bliss. But sometimes, we wake up from a nap feeling more tired than before. Why is this? And what is the perfect amount of time for a nap?

Running a business is hard enough. Don’t let QuickBooks and spreadsheets slow you down. It’s time to upgrade to NetSuite and stop paying for multiple systems that don’t give you the information you need when you need it.

Ditch all the old software you’ve outgrown. NetSuite by Oracle is the world’s No. 1 cloud business system. NetSuite gives you visibility and control over your financials, HR, inventory, e-commerce and more — all in one place.