172 in Roman Numerals

The royal titles, such as Henry I, Henry II, and so on, often use Roman numerals. Have you noticed these names and wondered what these symbols (I, II) represent? Those are Roman numerals.

In ancient times, people used to count using fingers, sticks, bones, etc. As life became more complex, a standard form was required to count. Ancient Romans used the Roman numeral system for this purpose. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols used for counting.

In Roman numerals, we use CLXXII to represent 172, where C is 100, L is 50, XX is 20, and II is 2. Let’s learn more about Roman numerals and how we write them.

There are certain basic rules for writing numbers in Roman numerals. In this section, let’s discuss some basic rules that need to be remembered when writing numbers in Roman numerals.

Rule 1: Addition Method

The addition method is used when a smaller number is placed after a larger number. For example, CLXXII → C + L + XX + II → 100 + 50 + 20 + 2 = 172

Rule 2: Repetition Method

To write larger numbers, certain Roman numerals can be repeated up to three times. For example, XX → 20.

Rule 3: Subtraction Method

If a smaller number precedes a larger number in Roman numerals, the smaller number is subtracted 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 don't write LL for 100; instead, we use C.

Let’s now learn how to write 172 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 172 in Roman numerals using the expansion method.

Step 1: Break the number based on the place value. Place values are ones, tens, hundreds, etc.

For 172, we write it as 100 + 50 + 20 + 2.

Step 2: Convert the numbers into Roman numerals.

- 100 in Roman numeral — C
- 50 in Roman numeral — L
- 20 in Roman numeral — XX
- 2 in Roman numeral — II

Step 3: Combine the Roman numerals together.

Therefore, 172 in Roman numerals is C (100) + L (50) + XX (20) + II (2) = CLXXII.

When writing large numbers in Roman numerals, we group the numbers. To write 172 in Roman numerals, we group 172 as 100 + 50 + 20 + 2.

- 100 in Roman numeral — C
- 50 in Roman numeral — L
- 20 in Roman numeral — XX
- 2 in Roman numeral — II

So, 172 is written as CLXXII in Roman numerals.

Roman numerals follow a certain pattern, making them look similar. In this section, we will learn some numbers related to the Roman numeral 172.

• Addition Rule: The addition method is used when a larger number is followed by a smaller numeral, where the values are added. For example, CLXXII = C + L + XX + II = 100 + 50 + 20 + 2 = 172.

• Grouping Method: Here, the given numbers are grouped based on their place value and then converted into Roman numerals. For example, 172 = 100 + 50 + 20 + 2 = CLXXII.

• Repetition Rule: Certain symbols (I, X, C, M) in the Roman numeral system can be repeated only up to three times. For example, XX = 20 (X is repeated twice to represent the number 20).

• Subtraction Method: This method is used when a smaller numeral precedes a larger one, indicating subtraction. For example, IV = 4.

• Limitation Rule: In Roman numerals, symbols like V, L, and D cannot be repeated.