1. Chapter 7 Class 8 Cubes and Cube Roots
  2. Serial order wise
  3. Ex 7.1

Ex 7.1, 2 (i) - Chapter 7 Class 8 Cubes and Cube Roots

Last updated at Sept. 1, 2021 by

Ex 7.1, 2 - Find the smallest number by which each of the numbers

Ex 7.1, 2 - Chapter 7 Class 8 Cubes and Cube Roots - Part 2

 

  1. Chapter 7 Class 8 Cubes and Cube Roots
  2. Serial order wise

    3. Ex 7.1

    Ex 7.2 →

Transcript

Ex 7.1, 2 Find the smallest number by which each of the following numbers must be multiplied to obtain a perfect cube. (i) 243 We see that 243 = 3 × 3 × 3 × 3 × 3 Since 3 does not occur in triplets, ∴ 243 is not a perfect cube. So, we multiply by 3 to make triplet So, our number becomes 243 × 3 = 3 × 3 × 3 × 3 × 3 × 3 Now, it becomes a perfect cube. So, we multiply 243 by 3 to make it a perfect cube

Chapter 7 Class 8 Cubes and Cube Roots
Serial order wise

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.