What is the Roman numeral representation of the number 45?

The Roman numeral representation of the number 45 is XLV. In Roman numerals, the letters represent specific values. The letter 'X' stands for 10, 'L' stands for 50, and 'V' stands for 5.

To break it down for 45:

• The numeral 'XL' translates to 40, which is derived from the fact that 'L' (50) is preceded by 'X' (10), indicating a subtraction (50 - 10).

• Following that, 'V' adds 5 to the total.

Thus, XL (40) plus V (5) equals 45, confirming that XLV is indeed the correct representation.

The other choices do not accurately represent the number 45. For instance, XLI symbolizes 41, which is constructed from 'X' (10) + 'L' (50) - 'I' (1). LIV represents 54, as it stands for 'L' (50) - 'I' (1) + 'V' (5). Lastly, XLVI represents 46, totaling 'XL' (40) plus 'VI' (6). Therefore, only XLV properly corresponds to the number 45.