30 in Roman Numerals: How to Write XXX with Rules and Examples

30 in Roman numerals is written as XXX. It is formed by repeating the Roman numeral X, which represents 10, three times. This follows the Roman numeral rule that allows certain symbols to be repeated up to three times to represent larger numbers.

Learning how to write 30 as XXX helps you understand the basic rules of Roman numerals and makes it easier to read and write other numbers. In this article, you'll learn how to convert 30 into Roman numerals, explore the rules used to form it, look at nearby Roman numerals, and solve practice questions to strengthen your understanding.

Table of Contents

• How to Write 30 in Roman Numerals?
• Roman Numerals for Numbers Related to 30
• Basic Rules to Write Roman Numerals
• Solved Examples on 30 in Roman Numerals
• Practice Question on 30 in Roman Numerals
• Frequently Asked Questions on 30 in Roman Numerals

 

How to Write 30 in Roman Numerals?

Writing 30 in Roman numerals involves representing 30 as the repetition of the fundamental Latin symbol X as: 30 = XXX.  As per Roman numeral rules the multiples of 10 like 20 and 30 are represented by repetition of X as XX and XXX. Hence, 30 is written as XXX. Let’s learn the step by step conversion process of 30 in Roman numerals:

Step 1: Expand and write number 30 in parts as: 30 = 10 + 10 + 10

Step 2: Replace each number with its respective symbol: 30 = X + X + X

Step 3: Combine them together as per Roman numeral Rules: 30 = XXX

Therefore, 30 in Roman numerals is written as XXX.

 

Roman Numerals for Numbers Related to Number 30

Here are Roman numerals close to 30:

30 = 10  + 10 + 10 = XXX 

31 = 10  + 10 + 10 + 1 = XXXI 

32 = 10  + 10 + 10  + 2 = XXXII 

33 = 10  + 10 + 10  + 3 = XXXIII

34 = 10  + 10 + 10  + 4 = XXXIV

35 = 10  + 10 + 10  + 5 = XXXV

36 = 10 + 10 + 10  + 6 = XXXVI 

37 = 10 + 10  + 10 + 7 = XXXVII

38 = 10 + 10  + 10 + 8 = XXXVIII

39 = 10 + 10  + 10 + 9 = XXXIX

40 = 50 – 10 = XL

  

Basic Rules of Writing Roman Numerals

• A symbol is added to itself if repeated. Example: II = 2, XX = 20, XXX = 30

• A symbol can be repeated only 3 times. Example: XXX = 30, CC = 200
  Symbols V(5), L(50), and D(500) are never repeated.

• If a smaller symbol comes after a bigger one, we add.
  Example: VI = 5 + 1 = 6

• If a smaller symbol precedes a larger one, we subtract.
  Example: IX = 10 - 1 = 9

• Symbols V, L, and D are never subtracted.
  I can be subtracted only from V and X.
  X can be subtracted only from L, C, and M.

 

Solved Examples on 30 in Roman Numerals

Example 1: Find the difference between LXX(70) and XL(40) in Roman numerals?

Solution: We know the value of LXX = 70 and XL = 40.

By subtracting the numeric values of LXX and XL we get: 70 – 40 = 30.
As, 30 is written as XXX in Roman numerals

Therefore, LXX – XL = XXX.

 

Example 2: What is the value of XVIII(18) + XII(12) in Roman numerals?

Solution: First, write the value of XVIII and XII in numbers:

XVIII = 18 and XII = 12

Now add them to get their sum: 18 + 12 = 30

30 in Roman numerals is XXX.

Therefore, XVIII + XII = XXX.

 

Example 3: Multiply  XV(15) by II(2) and express the result in Roman numerals.

Solution: The value of XV = 15 and II = 2 

By multiplying the values, we get: 15 X 2 = 30

Therefore, the result of XV multiplied by II is XXX. 

 

Example 4: Divide CXX(120) by IV(4) and write the answer in Roman form.

Solution: The value of CXX = 120 and IV = 4

By dividing the 120 by 4, we get: 120 ÷ 4 = 30

Therefore, CXX  ÷ IV = XXX. 

 

Practice Questions on 30 in Roman Numerals

1. Write 30 in Roman numerals.

2. Add X (10) and XX(20). Write answers in Roman numerals.

3. Divide CL (150) by V (5). Express results in Roman numerals.

4. Write the next three numerals after 30 in Roman numerals.

5. Subtract XX (20) from L (50) and write the result in Roman numerals.