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Last updated on February 21st, 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, use Roman numerals. Have you noticed the names and wondered what these symbols (I and II) represented? Those are Roman numerals. Earlier, people used to count using fingers, sticks, bones, etc. As life became more complex, a standard form was required for counting. 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 CDIV to represent 404, where CD is 400 and IV is 4. 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 a larger number. For example, VI → V + I → 5 + 1 = 6.
Rule 2: Repetition Method
To write larger numbers, certain Roman numerals can be repeated up to three times. For example, III → 3.
Rule 3: Subtraction Method
If a smaller number is placed before a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, IV → V - I → 5 - 1 = 4.
Rule 4: Limitation Rule
Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we don't write VV for 10; instead, we use X. Similarly, 8 is written as VIII, not IIIIIIII.
Let’s now learn how to write 404 in Roman numerals. Follow these methods to write the number in Roman numerals.
In the expansion method, based on place value, the number is broken down. In this section, we will learn how to write 404 in Roman numerals using the expansion method.
To write 404 in Roman numerals, follow the steps:
Step 1: Break the number based on place value, such as ones, tens, hundreds, etc.
For 404, we write it as 400 + 4.
Step 2: Convert the number into Roman numerals.
400 in Roman numerals — CD
4 in Roman numerals — IV
Step 3: Combine the Roman numerals together.
Therefore, 404 in Roman numerals is CD (400) + IV (4) = CDIV.
When writing a large number in Roman numerals, we group the number.
To write 404 in Roman numerals, we group 404 as 400 + 4.
400 in Roman numerals — CD
4 in Roman numerals — IV
So, 404 is written as CDIV in Roman numerals.
A historian discovered a scroll mentioning the year CDIV and wants to know how many years ago that was from the current year MMXXIII.
During a treasure hunt, a clue states that the total number of coins found is CDIV when 2 chests containing CLXII and CCXLII coins are combined. Verify if this statement is true.
An ancient text lists the number of warriors as CDIV. If they form X battalions with equal numbers, how many warriors are in each battalion?
A scholar is translating a document that describes a series of battles, noting that the total number of victories was CDIV. If CCCXXVI battles were won by the lead general, how many victories were credited to others?
Calculate the value of CDIV multiplied by II and express it 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.