Last updated on May 26th, 2025
Roman numerals are a way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman Numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman Numerals, rules, and examples.
The royal titles, such as Henry I, Henry II, and so on. Have you noticed the names and wondered what these symbols (I and II) represented? Those are the Roman Numerals. Earlier people used to count using fingers, sticks, bones, etc. When life became complex, a standard form was required to count. Ancient Romans used the Roman Numeral system to count. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols used to count.
In Roman Numerals, we use DXXIX to represent 529, where D is 500, XX is 20, and IX is 9. Let’s learn more about Roman numerals and how we write them.
There are certain basic rules to write a number in Roman Numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.
The addition method is used when the smaller number is placed after the larger number. For example, DXX → D + X + X → 500 + 10 + 10 = 520
To write a large number, there are certain Roman Numerals that can be repeated three times. III → 3.
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the large number. For example, IX → X - I → 10 - 1 = 9
The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we won't write VV for 10; instead, we use X. Similarly, we write 8 as VIII, not IIIIIIII.
Let’s now learn how to write 529 in Roman Numerals. Follow these methods to write the number in Roman Numerals.
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 529 in Roman numerals using the expansion method. To write 529 in Roman Numerals, follow the steps:
Step 1: Break the number based on place value. Place values include ones, tens, hundreds, etc. For 529, we write it as 500 + 20 + 9.
Step 2: Convert the number into Roman Numerals. 500 in Roman Numerals — D 20 in Roman Numerals — XX 9 in Roman Numerals — IX
Step 3: Combine these Roman Numerals together. Therefore, 529 in Roman Numerals is D (500) + XX (20) + IX (9) = DXXIX
When writing a large number in Roman Numerals, we group the numbers. To write 529 in Roman Numerals, we group 529 as 500 + 20 + 9.
So, 529 is written as DXXIX in Roman Numerals.
Students make mistakes when writing a number in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and the ways to avoid them.
Calculate the sum of DXX and IX.
The sum of DXX and IX is DXXIX.
First, convert the Roman numerals to numbers: DXX = 520 and IX = 9.
The sum is 520 + 9 = 529.
In Roman numerals, 529 is written as DXXIX.
A historian found that a manuscript was last updated in the year DXXIX. How many years ago was this if the current year is MMXXIII?
The manuscript was last updated 1494 years ago.
First, convert the Roman numeral year DXXIX to a number: DXXIX = 529.
Then, calculate the difference between the current year (2023) and 529: 2023 - 529 = 1494.
If a collector has DL paintings and plans to sell XXI of them, how many paintings will remain in his collection?
The collector will have DXXIX paintings remaining.
Convert the Roman numerals to numbers: DL = 550 and XXI = 21.
Subtract the number of paintings sold from the total: 550 - 21 = 529.
In Roman numerals, 529 is DXXIX.
A library acquired a collection of books published between the years CDXXXI and DXXIX. How many years does this range cover?
The range covers 98 years.
Convert the Roman numerals to numbers: CDXXXI = 431 and DXXIX = 529.
Subtract the earlier year from the later year to find the range: 529 - 431 = 98.
Write the Roman numeral for 400 + 100 + 20 + 9 using the expansion method.
The Roman numeral for 400 + 100 + 20 + 9 is DXXIX.
Step 1: Convert each number into Roman numerals: 400 = CD, 100 = C, 20 = XX, 9 = IX.
Combine them: 400 + 100 + 20 + 9 = 529, which is DXXIX in Roman numerals.
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.