HCF of 168 and 126 is

(a) 21          (b) 42          (c) 14          (d) 18

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  1. Class 10
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Transcript

Question 1 HCF of 168 and 126 is (a) 21 (b) 42 (c) 14 (d) 18 Doing prime factorization of both 168 and 126 168 = 2 × 2 × 2 × 3 × 7 126 = 2 × 3 × 3 × 7 ∴ HCF = 2 × 3 × 7 = 42 So, (b) is the correct answer

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.