The numbers were mostly easy to carve into stone.
They are relatively easy to chisel into stone.
The good roads and the Pax Romana made travel in the Roman world quick and easy.
NOTHING! It is a very easy system with very few rules.
Given the system of roads and the preservation of law and order, yes, it was relatively easy. . . for those times.
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For the same reasons that we need a numeracy system today which is based on the Hindu-Arabic numeral system that was a lot easier than the Roman numeral system that it replaced.
The Roman Numeral system is considered a base ten system.
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The Roman numeral system was formed by the ancient Etruscans.
Roman Numerals
You need to choose a plain, easy to read font such as Times New Roman, Courier, or Arial. Publishers will not accept fancy fonts, as they need to print books in an easy font. If this story is a school assignment/if it's graded, I suggest going with good old Times New Roman; it's easy to read and it's what many teachers are used to.
The imperial system is as good as the other systems like the metric system and it is easy to learn and teach it. in addition, the imperial system is universal in nature.