Write $XLV$ in Hindu-Arabic numerals.

We can write $XLV$ as $XL+V$

$$\begin{gathered} \Rightarrow XLV=(50-10)+5 \\ \Rightarrow XLV=40+5 \\ \Rightarrow XLV=45 \end{gathered}$$

Hence we can write $XLV$ in Hindu-Arabic form as $45$.