# Ex 7.2, 1 (x) - 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 7.2, 1 Find the cube root of each of the following numbers by prime factorisation method. (x) 91125We see that 91125 = 3 × 3 × 3 × 3 × 3 × 3 × 5 × 5 × 5 Since all factors occur in triplets ∴ 91125 is a perfect cube. Cube root of 91125 = 3 × 3 × 5 = 9 × 5 = 45

Ex 7.2

Ex 7.2, 1 (i)

Ex 7.2, 1 (ii)

Ex 7.2, 1 (iii)

Ex 7.2, 1 (iv)

Ex 7.2, 1 (v)

Ex 7.2, 1 (vi) Important

Ex 7.2, 1 (vii)

Ex 7.2, 1 (viii)

Ex 7.2, 1 (ix)

Ex 7.2, 1 (x) You are here

Ex 7.2, 2 (i) Important

Ex 7.2, 2 (ii)

Ex 7.2, 2 (iii)

Ex 7.2, 2 (iv)

Ex 7.2, 2 (v)

Ex 7.2, 2 (vi)

Ex 7.2, 2 (vii)

Ex 7.2, 3 Important

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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.