A maths question aimed at young children has been going viral on social media because it's been leaving some adults scratching their heads as they're unable to work it out - but can you solve it?
The question looks easy at first glance, but some have claimed it made them confused as they were unable to work out what the puzzle was actually asking them to do, leading to several different responses.
On Twitter, the quiz question has been posted by many different people and has racked up millions of views, but one particular user who shared a picture of the brain teaser said it "hurt his head", the Mirror reports.