Ex 3.6, 3 - HCF of co-prime number 4 and 15 was found by factorisation


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Ex 3.6, 3 HCF of co-prime numbers 4 and 15 was found as follows by factorization : 4 = 2 × 2 and 15 = 3 × 5 since there is no common prime factor, so HCF of 4 and 15 is 0. Is the answer correct? If not, what is the correct HCF? HCF of 4 & 5 We do prime factorisation of both 4 and 5 Thus, 4 = 2 × 2 15 = 3 × 5 Since there are no prime common factors The only common factor will be 1 So, HCF = 1 ∴ HCF will not be 0, but 1.

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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.