Only The Smartest 5% Of Americans Can Solve This Coffee Puzzle

By now we've all seen one of those "which cup will fill up first" puzzles on social media, but a new one has gone viral because of how deceptive it is. 

Think you've got it? Chances are you're wrong. 

Scroll down for the answer...

It's cup number 5. Do you see why?

All of the others are blocked off. 

Do you feel smart or dumb now?

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