Question

Express the following into Hindu-Arabic system:

$\mathrm{CDXLIX}$

Answer 1

Here,

$$\begin{gathered} \mathrm{CD}=500-100=400 \\ \mathrm{XL}=50-10=40 \\ \mathrm{IX}=10-1=9 \end{gathered}$$

So, $\mathrm{CDXLIX}=400+40+9$

$\therefore \mathrm{CDXLIX}=449$