Many do, but not all clock towers use roman numerals.
In Roman Numerals, 4 is represented as IV. Many, but not all, clock faces use IIII for 4. It is thought that this is because it provides a better visual balance to VIII for 8 on the other side of the clock face.
Letters are not numbers. Not all letters in the alphabet represent Roman numerals though some letters do.
As all United States issued paper currency contains Roman numerals, and such currency is traded worldwide, it is safe to say that nearly all countries use Roman numerals. However, there are no countries or cultures alive today which use Roman numerals for counting or math on a day-to-day basis.
All four of the clock-faces on the Palace of Westminster use Roman numerals for the hours, (I = 1, V = Five, X = Ten), which is why the points of the clock faces are III, VI, IX and XII respectively.
Roman numerals are important historically because they were the primary system used for counting and recording numbers in the Roman Empire and Western Europe for centuries. They are still used today in certain applications such as clock faces, movie credits, and for naming monarchs and popes. Additionally, understanding Roman numerals can enhance cultural appreciation and historical understanding.
Xviii.x.lxxxxi. All in capital letters.
All numbers can be written in roman numerals. 2786 is written as MMDCCLXXXVI.
Necessity is the mother of all inventions and Roman numerals were needed in the past just for the same reasons that we still need numbers today.
1311 is already in numerals but if you mean as in Roman numerals then they are MCCCXI
Romans used Roman numerals as their form of numbers. Romans needed Roman Numerals because they needed numbers to count, tell time, and do other things in life that involved numbers. Roman numerals were used because they could all be scribed using a flat chisel i.e X I V M.
Letters C I V I L are all Roman numerals = 100 1 5 1 50
mccxciii (in all capital letters)