You can amaze your friends by reading their thoughts. Here's a game you can do simply by asking a few questions and replacing letters with numbers. It's not magic ... it's mathematical! The educational side: This segment explains how we can still get to the same answer (4) following a sequence of precise calculations, thanks to the properties of the number 9. The result of the 5th step will always be 9, so when subtracting 5, we will always arrive at number 4, which is the letter D. Most people will think of Denmark (because there are not many recognized countries that start with letter D) and of the elephant as a big animal that begins with an E. Finally, all the elephants are gray.