It seems like every week there's another new thing sending the internet wild.
This week, it’s a little mind teaser.
The picture shows a tap dripping into a series of cups connected by pipes.
To solve the riddle, you need to work out which cup will fill with water first. Make sure you look closely because the answer may surprise you.
So, which cup fills up first?
Are you part of the 99% who fails or the 1% who reigns supreme?