NCERT Solutions Class 8 Mathematics Chapter 7 Cube and Cube Roots

Exercise 7.1 Q.1) Which of the following numbers are not perfect cubes? (i) 216 (ii) 128 (iv)100 (v) 46656 Sol.1) (i) 216 Prime factors of 216 = 2 × 2 × 2 × 3 × 3 × 3 Here all factors are in groups of 3’s (in triplets) Therefore, 216 is a perfect cube number…