Can you solve this crazy difficult, super satisfying math puzzle from a Japanese middle schooler?

https://ift.tt/eA8V8J Casey BaseelStrap on your thinking caps, because there are 20 blanks to fill in, and only one way to do it right. Growing up as a youngest child, I often found it sort of frustrating that everyone else in the family knew more about the world than I did. That said, I don’t think I’d have […]