Well before this feed took off, this math problem went viral on a Friday night. So, posting it again! No cheating. Here's a simple math test for you. A traveler must make a 60-mile round trip between two towns, Aliceville and Bobtown. The distance each way is 30 miles. Going from Aliceville to Bobtown, the traveler drives at exactly 30 miles per hour. By the time they reach Bobtown, they decide they want to average 60 miles per hour for the entire 60-mile journey. Question: How fast must they drive on the return trip from Bobtown to Aliceville to achieve an overall average of 60 mph?

You all got this much more quickly than the original post:

The "real" answer is, it's not actually infinity because of nuances in physics of the speed of light. But it's close. See the Reddit link above if you want your mind blown.