Test Your Knowledge: Richest People Quiz

Bettencourt is also in the overall top 10 richest people .

The billionaire heiress is a granddaughter of the man who founded Cox Enterprises.

Bill Gates has been named the richest person 17 times.

Sadly, for Gates, this is actually a drop in his net worth, which was closer to $80 billion in 2015.

Ortega is worth nearly $70 billion.

In her time (circa 1500 B.C.E.) she may have controlled as much as a fifth of the world's wealth.

Inditex has over 7,000 stores in nearly 100 countries.

It was a forerunner to Google created in part by Larry Page, who is worth around $40 billion.

His savvy (and nearly psychic) ability in investing has made him a very rich man.

The famously frugal investor has a net worth of around $60 billion.

The heiress is a huge stakeholder in L'Oreal, the ubiquitous cosmetics company.

She inherited a huge stake in the company after her father's passing in 2002.

The college dropout has a fortune of around $30 billion.

He's a billionaire 25 times over and has contracted with some of the biggest icons in sports, such as Michael Jordan.

She owns almost all of the stock in the country and is worth around $7 billion.

Her rags-to-riches story is complete; she is admired by impoverished Chinese everywhere.

She also has stakes in the pharmaceuticals and clean energy industries.

When she was 16 she was nearly kidnapped by men who wanted to use her for ransom.

Oracle has made heaps of money in database and enterprise-level software, among other tech ventures.

As of 2016, he is "only" worth about $27 billion.

As a masterful politician, she controlled many businesses; she blew much of her money on wars.

Gates has funded fights against disease and poverty and a whole lot of other good causes.

With more than 500 billionaires, the U.S. has double the number of China.

His social media empire now includes more than 1.6 billion users around the world.

Gates and Buffett are famously friendly, and they coordinate on many projects.

Wu may have killed her own infant daughter; in the end, she may have become the richest female in world history.

He's the head of huge telecommunications companies in Latin America but also invests in many other industries.

His logical and nimble mind has helped him navigate the complexities of the financial world.

That meant that each of those rich folks was monetarily worth about 52 million poor individuals.

He's given billions to his favorite causes, in the U.S. and abroad.