# Ex 7.1, 1 (iv) - Chapter 7 Class 8 Cubes and Cube Roots

Last updated at Sept. 1, 2021 by Teachoo

Last updated at Sept. 1, 2021 by Teachoo

Transcript

Ex 7.1, 1 Which of the following numbers are not perfect cubes? (iv) 100 Doing Prime factorization of 100 We see that 100 = 2 × 2 × 5 × 5 Since 2 & 5 do not occur in triplets, ∴ 100 is a not perfect cube.

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Davneet Singh

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.