Which Roman numeral is used to represent the number 5?

The Roman numeral that represents the number 5 is V. In Roman numeral notation, numbers are formed by combining letters and their corresponding values. The letter V is specifically assigned the value of 5, making it essential to recognize in the context of Roman numeral systems.

The other letters represent different values: X stands for 10, I represents 1, and L signifies 50. Understanding these basic Roman numeral values is crucial, as they form the foundation for reading and interpreting more complex combinations of numbers in the Roman numeral system. Therefore, the correct association of the letter V with the number 5 is fundamental to grasping the broader concept of Roman numerals.