It’s rotated, unnumbered, and tricky as hell—but there’s one exact answer… More here, but try not to click the link.
This exact puzzle was reportedly given to 13- to 14-year-olds in Russia as a high school logic test. Economics and math pro Presh Talwalkar of the YouTube channel Mind Your Decisions broke down just how to solve the problem in a surprisingly short video—and it’s a doozy.