Funny you should ask! These letters are like the odd socks of the alphabet; they don't come out often, but when they do, they're pretty noticeable. Q, X, and Z have their roots in ancient languages like Greek and Latin. Despite their rarity in English, they stuck around because they're handy for words borrowed from other languages. So, next time you play Scrabble, you might thank those ancient linguists for the extra points!