What is the largest number that can be represented by one Roman numeral?
The largest number that can be represented by a single Roman numeral is 1,000, which is denoted by the letter M. Roman numerals are based on seven basic symbols, each with a fixed value: I (1), V (5), X (10), L (50), C (100), D (500), and M (1,000). Among these individual symbols, ‘M’ holds the highest value. While larger numbers can be formed by combining these numerals according to specific rules (such as repetition for addition, and subtractive notation for certain combinations like IV for 4 or CM for 900), the question specifically asks for the largest number represented by one Roman numeral. Therefore, ‘M’ for 1,000 is the correct answer in this context, before considering any modifications like overlines to multiply values.