If you know someone, they're probably on one, if not several Facebook (META 1.54%) -owned platforms -- the company currently has roughly 20% of the world on its flagship social network, while its Instagram and WhatsApp services boast over 300 million and 900 million monthly active users, respectively. Mark Zuckerberg and company have been busy expanding their reach in the social media space and beyond -- so busy you might have missed some of their moves.

Take the quiz below to see how well you know Facebook -- and don't cheat and ask a friend for the answers!

The next billion-dollar iSecret
The world's biggest tech company forgot to show you something at its recent event, but a few Wall Street analysts and the Fool didn't miss a beat: There's a small company that's powering their brand-new gadgets and the coming revolution in technology. And we think its stock price has nearly unlimited room to run for early in-the-know investors! To be one of them, just click here.

Note: Users may have to adjust their Adobe Flash settings to enable the quiz widget.