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), C (100), D (500), and M (1000) are the symbols we use to count.
In Roman Numerals, we use MCMLXXV to represent 1975. Here, M is 1000, CM is 900, LXX is 70, 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, VI → V + I → 5 + 1 = 6
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, IV → V - I → 5 - 1 = 4
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 we write as VIII, not IIIIIIII.
Let’s now learn how to write 1975 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 1975 in Roman numerals using the expansion method. To write 1975 in Roman Numerals, follow the steps,
Step 1: The number is broken based on the place value. Place value that is ones, tens, hundreds, etc. For 1975, we write it as 1000 + 900 + 70 + 5
Step 2: Converting the number into Roman Numerals
1000 in Roman Numeral - M
900 in Roman Numeral - CM
70 in Roman Numeral - LXX
5 in Roman Numeral - V
Step 3: Combining them Roman Numerals together. Therefore, 1975 in Roman Numeral is M (1000) + CM (900) + LXX (70) + V (5) = MCMLXXV
When writing a large number into Roman Numeral, we group the number. To write 1975 in Roman Numeral, we group 1975 as 1000 + 900 + 70 + 5
So, 1975 is written as MCMLXXV 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 museum has a collection of MCMLXXV ancient coins and wants to divide them into CLXXV display cases. How many coins will each case contain?
Each display case will contain XI coins.
To find out how many coins each display case will contain, divide the total number of coins by the number of display cases.
MCMLXXV = 1975
CLXXV = 175
Therefore, 1975 / 175 = 11
11 in Roman numerals is XI.
An art gallery received MCMLXXV inquiries about their new exhibit over LXXV days. Determine the average number of inquiries per day.
The average number of inquiries per day is XXVI.
To find the average, divide the total number of inquiries by the number of days.
MCMLXXV = 1975
LXXV = 75
Therefore, 1975 / 75 = 26
26 in Roman numerals is XXVI.
A historian is cataloging a set of documents from the year MDCCCLXXXV to MCMLXXV. How many years are spanned by these documents?
The documents span XC years.
To find the span of years, subtract the earlier year from the later year.
MCMLXXV = 1975
MDCCCLXXXV = 1885
1975 - 1885 = 90
90 in Roman numerals is XC.
A collector increases their collection by MCC books every year. If they started with DCCLXXXV books, how many books will they have in the year MCMLXXV?
By the year MCMLXXV, the collector will have MMMMDCCLXXXV books.
First, determine how many years will pass between the starting year and MCMLXXV.
MCMLXXV = 1975
DCCLXXXV = 785
1975 - 785 = 1190 years Books increased each year by MCC = 1200 Starting amount: DCCLXXXV = 785 785 + (1200 * 1190) = 4,785,785
4785 in Roman numerals is MMMMDCCLXXXV.
A company produced XXV batches of gadgets each containing MCMLXXV units. What is the total number of units produced?
The total number of units produced is XLIX,375.
Multiply the number of batches by the number of units per batch.
XXV = 25
MCMLXXV = 1975
25 * 1975 = 49,375
49,375 in Roman numerals is XLIX,375.
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.