72 in Roman Numerals

72 in Roman numerals is written as LXXII, a traditional numbering system used by the ancient Romans. To convert 72, we can express it in expanded form: 72 = 50 + 10 + 10 + 1 + 1. Replacing these values with Roman symbols gives L + X + X + I + I, which forms LXXII. Understanding how to read and write numbers like 72 in Roman numerals helps learners develop number sense and logical thinking. It also explains how the addition of Roman symbols creates larger values, making the study of LXXII both educational and connected to historical practices. Learning Roman numerals like 72 makes number learning engaging and meaningful for students and parents alike.

 

Table of Contents

• How to Write 72 in Roman Numerals?
• Roman Numerals for Numbers Related to 72
• Solved Examples on 72 in Roman Numerals
• Fun Facts on 72 in Roman Numerals
• Practice Questions on 72 in Roman Numerals
• Conclusion

 

How to Write 72 in Roman Numerals?

The number 72 in Roman numerals is LXXII. To write 72 correctly, we follow the rules of Roman numerals, using letters like I, V, X, L, C, D, and M.

Step 1: Break the number into parts

Since there are no direct symbols for 70 or 2, we split 72 into values that Roman numerals can represent:

72 = 50 + 10 + 10 + 1 + 1

Step 2: Replace each part with Roman letters

• 50 = L

• 10 + 10 = X + X

• 1 + 1 = I + I

Step 3: Combine the Roman numerals

• L + X + X + I + I = LXXII

Step 4: Final Roman numeral

• So, 72 in Roman numerals = LXXII

 

Roman Numerals for Numbers Related to 72

Solved Examples on 72 in Roman Numerals

Example 1: How to represent the sum of XL (40) and XXXII (32) in Roman numerals?

Solution:

Step 1: Convert each Roman numeral to a number.

XL = 40, XXXII = 32

Step 2: Join them together.

40 + 32 = 72

Step 3: Write 72 in Roman numerals.

72 = LXXII

 

Example 2: Convert the product of IX (9) and VIII (8) to Roman numerals.

Solution:

Step 1: Write their numeric values.

IX = 9, VIII = 8

Step 2: Multiply them.

9 × 8 = 72

Step 3: Express the result in Roman numerals.

72 = LXXII

 

Example 3: There are 50 apples in a basket, and 22 more apples have been added. Express the total in Roman numerals.

Solution:

Step 1: Write the numbers in Arabic form.

50 + 22 = 72

Step 2: Convert each part to Roman numerals.

50 = L, 22 = XXII

Step 3: Combine symbols.

L + XXII = LXXII

 

Example 4: Subtract VIII (8) from LXXX (80). Write the result in Roman numerals.

Solution:

Step 1: Convert each numeral to its value.

LXXX = 80, VIII = 8

Step 2: Subtract.

80 - 8 = 72

Step 3: Write 72 in Roman numerals.

72 = LXXII

 

Example 5: A student read 36 pages on Monday and a further 36 pages on Tuesday. Express the total number of pages read in Roman numerals.

Solution:

Step 1: Add the numbers.

36 + 36 = 72

Step 2: Convert to Roman numerals.

36 = XXXVI, then

XXXVI + XXXVI = LXXII

 

Fun Facts on 72 in Roman Numerals

• LXXII follows the additive rule of Roman numerals (no subtraction needed).

• The Roman numeral system has no symbol for zero.

• From 70 to 79, Roman numerals start with LXX (for 70) and end with units like I to IX.

• Roman numerals are still used in book chapters, movie titles, and wall clocks.

• 72 is an even number and can be evenly divided by 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36.

 

Practice Questions on 72 in Roman Numerals

1. Write 72 in Roman numerals.

2. Add L (50) and XXII (22). Express your answer in Roman numerals.

3. Subtract II (2) from LXXIV (74). Write the result in Roman numerals.

4. Multiply VI (6) by XII (12). Express the answer in Roman numerals.

5. Write the next three numbers after 72 in Roman numerals.

 

Conclusion

72 in Roman numerals is written as LXXII, created by adding 50 (L), 10 + 10 (XX), and 1 + 1 (II) together. Understanding LXXII helps learners see how Roman numerals combine letters using the rules of addition to form larger numbers. By practicing numbers around 72, such as 71 (LXXI), 73 (LXXIII), 75 (LXXV), and 78 (LXXVIII), students can identify patterns and strengthen their number sense. Learning how 72 and related numbers are formed also improves logical thinking and makes it easier to read Roman numerals in daily life, such as on clocks, book chapters, movie titles, and historical monuments.

Explore 72 in Roman numerals and other number topics with guided lessons and examples at Orchids International School.