Question

Convert XLI in Hindu-Arabic numerals.

• A. 43
• B. 51
• C. 49
• D. 41

Answer 1

The correct option is D 41

$\begin{array}{cccccccc}\text{Roman}& \text{I}& \text{V}& \text{X}& \text{L}& \text{C}& \text{D}& \text{M}\\ \text{Hindu-Arabic}& 1& 5& 10& 50& 100& 500& 1000\end{array}$

If a Roman numeral with the smaller value is to the left of the one with greater value, then we subtract the lower value from the higher value.

Also, if a Roman numeral with the smaller value is to the right of the one with greater value, then we add them.

So, XL = 50 - 10 = 40.
Also, I = 1.

Therefore, XLI = 40 + 1 = 41.