Is the bus traveling left or right?
It's a simple question based on a simple image — but it's causing adults to stop and think.
The brain teaser showing a school bus with two oppositely facing arrows above it was featured in the National Geographic series "Brain Games." According to Britain's Daily Mail, 80 percent of children under 10 years old got the correct answer almost instantly but adults had to think about it much harder.
So which direction is the bus driving?
The answer is easy when one realizes no doors are visible. This means — in America, at least — the bus must be traveling to the left.
Clint Davis covers entertainment and trending news topics for the Scripps National Desk. Follow him on Twitter @MrClintDavis.