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Ex 6.1, 1 Which of the following numbers are not perfect cubes? (iii) 1000 Doing Prime factorization of 1000 We see that 1000 = 2 × 2 × 2 × 5 × 5 × 5 Since 2 & 5 occur in triplets, ∴ 1000 is a perfect cube.

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.