Question

What is the Hindu-Arabic numeral for $\mathrm{XLVIII}$ ?

Answer 1

The Roman numeral $\mathrm{XLVIII}$ have fundamental symbols, $\mathrm{X}$ which represents $10$ , $\mathrm{L}$ represents $50$, $\mathrm{V}$ represents $5$, $\mathrm{I}$ represents $1$,

Applying Rule 3, we know if a smaller symbol is written to the left of a larger symbol is always subtracted from the larger symbol.

Hence we get the Hindu-Arabic numeral for given Roman numeral as below,

$\mathrm{XLVIII}$ $=(50-10)+5+1+1+1$

$=48$