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 CXCII to represent 192, where C is 100, XC is 90, and II is 2. 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.
Rule 1: Addition Method
The addition method is used when the smaller number is placed after the larger number. For example, II → I + I → 1 + 1 = 2.
Rule 2: Repetition Method
To write a large number, there are certain Roman Numerals that can be repeated three times. III → 3.
Rule 3: Subtraction Method
If a small number precedes a large number in Roman Numerals, we subtract the smaller number from the larger number. For example, XC → C - X → 100 - 10 = 90.
Rule 4: Limitation Rule
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, and 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 192 in Roman Numerals. Follow these methods to write the number in Roman Numerals.
By Expansion Method
By Grouping Method
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 192 in Roman numerals using the expansion method.
To write 192 in Roman Numerals, follow these steps:
Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc.
For 192, we write it as 100 + 90 + 2.
Step 2: Convert the number into Roman Numerals.
- 100 in Roman Numeral — C
- 90 in Roman Numeral — XC
- 2 in Roman Numeral — II
Step 3: Combine the Roman Numerals together.
Therefore, 192 in Roman Numerals is C (100) + XC (90) + II (2) = CXCII.
When writing a large number into Roman Numerals, we group the number.
To write 192 in Roman Numerals, we group 192 as 100 + 90 + 2.
- 100 in Roman Numeral — C
- 90 in Roman Numeral — XC
- 2 in Roman Numeral — II
So, 192 is written as CXCII 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.
A historian is cataloging artifacts and finds that one set is labeled CXXIV and another is labeled LXVIII. What is the total number of artifacts in both sets combined?
The total number of artifacts is CXCII.
CXXIV = 124
LXVIII = 68
Adding these together: 124 + 68 = 192
192 in Roman Numerals is CXCII.
An ancient scroll mentions that a library once held DCCXL books, but due to a fire, DLXII were destroyed. How many books remain in the library?
The number of books remaining is CLXXVIII.
DCCXL = 740
DLXII = 562
Subtracting the destroyed books: 740 - 562 = 178
178 in Roman Numerals is CLXXVIII.
A collection of coins is divided equally among XVI treasure chests, with each chest receiving an equal number of coins. If the total number of coins is MMXLVIII, how many coins does each chest contain?
Each chest contains CXXVIII coins.
MMXLVIII = 2048
XVI = 16
Dividing the coins among the chests: 2048 / 16 = 128
128 in Roman Numerals is CXXVIII.
Find the product of VIII and XXIV.
The product of VIII and XXIV is CXCII.
VIII = 8
XXIV = 24
The product of 8 × 24 = 192
192 in Roman Numerals is CXCII.
A mural contains CCCXCVII tiles, and an artist adds another CLXVIII tiles. Find the new total number of tiles in Roman numerals.
The new total number of tiles is DLXV.
CCCXCVII = 397
CLXVIII = 168
Adding these together: 397 + 168 = 565
565 in Roman Numerals is DLXV.
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.