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

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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A number is increased by 20% and then decreased by 20%. What is the net change?

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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 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 cone has a base radius of 7 cm and height of 24 cm. What is its volume?

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

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What is the value of x if log(x) + log(4) = log(32)?

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The sides of a triangle are 7, 24, and 25. Is this a right triangle?

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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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What is the sum of all angles in a hexagon?

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