Viral logic test from China

There is a clever way to solve this seemingly challenging question. What is the height of the table? Problem adapted from Subscribe: Playlist to watch all videos on MindYourDecisions: This is the only channel to feature math topics suggested by people around the world. Support the channel on Patreon so we can share the beauty of mathematics and make the world a better place: If you buy from the links below I may receive a commission for sales. This has no effect on the price for you. My Books “The Joy of Game Theory“ shows how you can use math to out-think your competition. (rated 3.9/5 stars on 35 reviews) “The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias"