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Roman numerals, often seen in old clocks or historical documents, use letters like I, V, X, L, C, D, M to represent numeric values.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 LCM of two numbers is 60, and their HCF is 5. If one of the numbers is 20, what is the other number?

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What is the sum of the interior angles of a hexagon?

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A rectangle has a length of 10 cm and a width of 5 cm. What is the diagonal of the rectangle?

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

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If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

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What is the 7th term of the arithmetic progression 3, 6, 9, 12,...?

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If a person can type 45 words per minute, how many words can they type in 2 hours?

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If a = 4 and b = 5, what is the value of (a+b)^2?

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What is the sum of all even numbers between 1 and 100?

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If 2a + b = 10 and a - b = 4, what is the value of a?

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