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Question 8 - MCQs from NCERT Exemplar - Chapter 1 Class 10 Real Numbers

Last updated at May 29, 2023 by

If two positive integers a and b are written as  a = x 3 y2 and b = xy 3 ; x, y are prime numbers, then  HCF (a, b) is:

(a)xy                         (b) xy 2

(c) x 3 y 3                    (d) x2 y 2

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Question 8 If two positive integers a and b are written as a = x3 y2 and b = xy3; x, y are prime numbers, then HCF (a, b) is: xy (b) xy2 (c) x3 y3 (d) x2 y2 Since a = x3 y2 = x . x . x . y . y b = xy3 = x . y . y . y Thus, HCF = x . y . y = xy2 So, correct answer is (B)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.