Flexi Says:
In Roman numerals, XII represents the number 12.
To convert a Hindu-Arabic number to Roman Numeral, we write the number in expanded form, followed by their respective roman letter and add/subtract them.
In Roman numerals, 10 is represented by@$\begin{align*}X\end{align*}@$and 1 is represented by @$\begin{align*}I.\end{align*}@$
Thus, we have
@$\begin{align*}12 &= 10 + 2 \\&= X + II\\&= XII\end{align*}@$
Click here to learn more about the Roman Numerals!