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 perimeter of a square is 40 cm, what is the area of the square?

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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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What is the square root of 144?

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What is the sum of all odd numbers from 1 to 99?

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If 8x = 512, what is the value of x?

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A train 150 m long passes a pole in 15 seconds. What is its speed?

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

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What is the square root of 121?

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

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If x^3 - 3x^2 + 4 = 0, what is one root of the equation?

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