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 cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?

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A train 120 meters long is moving at a speed of 54 km/h. How long will it take to pass a pole?

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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 LCM of 15 and 20?

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The ratio of two numbers is 3:5, and their sum is 64. What are the numbers?

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What is the square root of 144?

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A sphere has a radius of 7 cm. What is its volume?

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If x^2 - 5x + 6 = 0, what are the roots?

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If a cone has a radius of 5 cm and a height of 12 cm, what is its slant height?

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If x:y = 2:3 and z:y = 4:3, what is x:z?

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