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Last updated on February 24th, 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 fingers, sticks, bones, etc., to count. When life became complex, a standard form was required to count. Ancient Romans used the Roman Numeral system for counting. 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 CXL to represent 140, where C is 100, XL is 40. 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 a smaller number is placed after the larger number. For example, VI → V + I → 5 + 1 = 6.
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 is placed before a large number in Roman Numerals, we subtract the smaller number from the larger number. For example, IX → X - I → 10 - 1 = 9.
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 140 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 140 in Roman numerals using the expansion method.
To write 140 in Roman Numerals, follow the steps:
Step 1: The number is broken based on the place value, such as ones, tens, hundreds, etc.
For 140, we write it as 100 + 40.
Step 2: Convert the number into Roman Numerals:
100 in Roman Numeral — C
40 in Roman Numeral — XL
Step 3: Combine the Roman Numerals together.
Therefore, 140 in Roman Numerals is C (100) + XL (40) = CXL.
When writing a large number into Roman Numerals, we group the number.
To write 140 in Roman Numerals, we group 140 as 100 + 40:
100 in Roman Numeral — C
40 in Roman Numeral — XL
So, 140 is written as CXL in Roman Numerals.
A historian is decoding an ancient manuscript that lists CXL artifacts spread across XIV regions. How many artifacts are there per region?
A treasure map indicates that a pirate buried LXX doubloons in each of II locations. How many doubloons were buried in total?
An ancient city was known to house CLX inhabitants and later had XX less due to migration. How many inhabitants remained?
A scribe needs to record the total number of scrolls, combining two libraries with LXX and LXX scrolls, respectively. What is the total in Roman numerals?
A ruler decrees that a tax of XIV denarii is to be collected from each of X villages. How much tax is collected in total?
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.