The English Alphabet X is very versatile in use. This fact was taught to us not in English class but in Algebra which was taught to us by our school principal. She was a very gentle lady but her selection of hiring teachers was tough. She wanted the best possible teacher in every subject with not only the knowledge but the patience required to be a teacher. While a lot of women had the patience, not a whole lot of women had the knowledge of Algebra. She only wanted to hire female teachers. Therefore she had to teach. My husband was surprised that what he learned in eighth grade I learned in seventh grade namely the value of X.
Each and every Roman numeral may not be very attractive but I like the number ten, the letter X. It seems like the letter X got the respect it deserves. It may not have a place at the top of the hour in a clock, but the place of letter X as the mysterious answer to questions in Algebra is very fascinating to young students. I am used to Metric system as India changed the measurement of cloth and liquids and weights. My daughter read an article that was arguing about using twelve as a method of counting things. It says that twelve is an easier number to deal with than ten is because it is divisible by three and four while ten is not.
Whether or not Roman numeral ten is used today, I think it is important to learn the Roman numerals just the same as history is a great resource for us to learn from.