Roman numerals: Class 6 practice

What you should know first

• Place value

The idea behind roman numerals

Roman numerals use I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. Symbols are added left to right, but a smaller symbol written before a larger one is subtracted (IV = 4, XC = 90). No symbol repeats more than three times.

Step-by-step method

1. Split the number into thousands, hundreds, tens and ones.
2. Write each part (e.g. 90 = XC, 4 = IV).
3. Join the parts in order.

Worked example 1 (Basic)

Write 27 in Roman numerals.

1. Split by place value
2. Combine: XXVII
3. Answer: XXVII

Worked example 2 (Standard)

Write 166 in Roman numerals.

1. Split by place value
2. Combine: CLXVI
3. Answer: CLXVI

Worked example 3 (Challenge)

Write MMMDCCCXXIII as an ordinary number.

1. Read pairs where a smaller symbol comes first as subtraction
2. Total = 3823
3. Answer: 3823

Common mistakes and misconceptions

• Writing IIII for 4
• Writing IC for 99 (correct: XCIX)

Practice questions

1. (Basic) Write 28 in Roman numerals.
2. (Basic) Write 25 in Roman numerals.
3. (Standard) Write 177 in Roman numerals.
4. (Standard) Write 320 in Roman numerals.
5. (Challenge) Write MMDCCCLXVIII as an ordinary number.
6. (Challenge) Write MMMDCCCXXIX as an ordinary number.

Answer key with full working

• Q1: Split by place value → Combine: XXVIII → Answer: XXVIII
• Q2: Split by place value → Combine: XXV → Answer: XXV
• Q3: Split by place value → Combine: CLXXVII → Answer: CLXXVII
• Q4: Split by place value → Combine: CCCXX → Answer: CCCXX
• Q5: Read pairs where a smaller symbol comes first as subtraction → Total = 2868 → Answer: 2868
• Q6: Read pairs where a smaller symbol comes first as subtraction → Total = 3829 → Answer: 3829

Syllabus note

This skill is listed under "Knowing Our Numbers" for Class 6 in the NCERT/CBSE books. ICSE, IGCSE, IB and state boards may teach it in a different chapter or year.

Answers on this page are generated and automatically re-checked by a second, independent calculation. They have not been reviewed by a teacher — if you spot a problem, tell us on WhatsApp.

Related practice and notes

• Knowing Our Numbers chapter notes (Class 6)
• Indian and international place value
• Rounding and estimating sums
• HCF and LCM by prime factorisation
• Adding and subtracting unlike fractions
• Unitary method word problems
• Perimeter and area of rectangles
• All Class 6 practice

Frequently asked questions

Which chapter is roman numerals in?

"Knowing Our Numbers", Class 6 Maths (NCERT/CBSE). Other boards may place it differently.

How were the answers checked?

Answers on this page are generated and automatically re-checked by a second, independent calculation. They have not been reviewed by a teacher — if you spot a problem, tell us on WhatsApp.