Topic Details (Notes format)

How to Identify and Use Perfect Cubes

Subject: Mathematics

Book: Maths Mastery

A perfect cube is an integer that is the cube of another integer, such as 27 = 3³ or 64 = 4³. Spotting these efficiently helps with factoring polynomials (like x³ – 8) or simplifying cube roots. Perfect cubes appear in 3D volume calculations, for instance, a 5×5×5 cube has a volume of 125. Understanding these patterns (1, 8, 27, 64, 125, ...) can streamline computations and deepen your exploration of algebraic identities like a³ ± b³. Whether comparing volumes or factoring expressions, perfect cubes are a potent tool in advanced math and practical tasks.

Practice Questions

If the length of a rectangle is doubled and the width is halved, what is the change in area?

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The perimeter of a rectangle is 50 cm, and its length is 15 cm. What is its width?

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

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What is the remainder when 5^100 is divided by 3?

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

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A cube has a side length of 4 cm. What is its volume?

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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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If the average of five consecutive odd numbers is 25, what is the largest number?

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What is the area of an equilateral triangle with side length 10 cm?

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If a:b = 5:7 and b:c = 6:11, what is a:c?

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