Mary Barra. Indra Nooyi. Meg Whitman. Sheryl Sandberg.

You know their names, but how well do you really know Fortune‘s 50 Most Powerful Women? It’s not all about the companies they run, after all—there are people behind those massive brands.

Can you guess who used to be a CIA agent? Or who was once a physicist? Do you know who once wanted to become a physical therapist?

Take this quiz to test your knowledge about the most important women in business.

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