Topic Details (Notes format)

How to Convert Roman Numerals to Arabic Numerals

Subject: Mathematics

Book: Maths Mastery

Roman numerals, often seen in old clocks or historical documents, use letters like I, V, X, L, C, D, M to represent numeric values. For example, IX means 9 (10 – 1), and XVI means 16 (10 + 5 + 1). Generally, if a smaller numeral precedes a larger one, you subtract; otherwise, you add. So MCMLXXXIV is 1984. By learning these rules—like I=1, V=5, X=10, L=50, C=100, D=500, M=1000—you can decode centuries-old texts, interpret monument inscriptions, or even style modern events. Converting Roman numerals fosters a deeper appreciation of number systems and historical contexts.

Practice Questions

The simple interest on Rs. 4000 at 5% per annum for 2 years is:

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A triangle has angles 60°, 60°, and 60°. What type of triangle is it?

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What is the LCM of 15 and 20?

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What is the value of x if 3x + 7 = 16?

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If x + y = 10 and xy = 21, what is the value of x³ + y³?

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What is the sum of the first 10 positive even numbers?

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The LCM of 12 and 15 is:

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A man invests Rs. 5000 at 5% per annum simple interest. What is the total amount after 3 years?

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What is the sum of the first 20 odd numbers?

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The sides of a triangle are 13 cm, 14 cm, and 15 cm. What is its area?

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