Last updated on May 26th, 2025
Roman numerals are the 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., to count earlier. 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), D (100), and M (1000) are the symbols we use to count.
In Roman Numerals, we use LXV to represent 65, here L is 50, X is 10, and V is 5. 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, LXV → L + X + V → 50 + 10 + 5 = 65
To write a large number, there are certain Roman Numerals that can be repeated three times. III → 3.
If a smaller number is followed by a larger number in Roman Numerals, we subtract the smaller number from the larger number, it is a subtraction method. 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, and 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 65 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 65 in Roman numerals using the expansion method.
To write 65 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value. Place value includes ones, tens, hundreds, etc.
For 65, we write it as 50 + 10 + 5.
Step 2: Convert the number into Roman Numerals:
50 in Roman Numeral — L
10 in Roman Numeral — X
5 in Roman Numeral — V
Step 3: Combine the Roman Numerals together:
Therefore, 65 in Roman Numeral is L (50) + X (10) + V (5) = LXV
When writing a large number into Roman Numerals, we group the numbers.
To write 65 in Roman Numerals, we group 65 as 50 + 10 + 5:
50 in Roman Numeral — L
10 in Roman Numeral — X
5 in Roman Numeral — V
So, 65 is written as LXV 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 LXV ancient artifacts and wants to distribute them evenly among V displays. How many artifacts will each display hold?
Each display will hold XIII artifacts.
To find the number of artifacts per display, divide the total number of artifacts by the number of displays.
LXV = 65
V = 5
65 / 5 = 13
13 in Roman numerals is XIII.
Find the difference between DCC and LXV.
The difference between DCC and LXV is DCXXXV.
Subtract the smaller number from the larger number.
DCC = 700
LXV = 65
700 - 65 = 635
635 in Roman numerals is DCXXXV.
A museum has a collection of CCXLV coins. If they add another LXV coins to the collection, what will be the new total?
The new total will be CCCX.
Add the two numbers together.
CCXLV = 245
LXV = 65
245 + 65 = 310
310 in Roman numerals is CCCX.
Write the Roman numeral for 100 minus 65 using the subtraction method.
The Roman numeral for 100 minus 65 is XXXV.
Subtract 65 from 100.
C = 100
LXV = 65
100 - 65 = 35
35 in Roman numerals is XXXV.
Convert the sum of 28 and 37 into Roman numerals using the expansion method.
The Roman numeral for 28 + 37 is LXV.
First convert the numbers 28 and 37 into Roman numerals.
28 = XXVIII
37 = XXXVII
Add the numbers together: 28 + 37 = 65
Using the expansion method: 65 = 50 + 10 + 5 = LXV.
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.