If you know someone, they're probably on one, if not several Facebook (NASDAQ:FB) -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!

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