Prime factors of the denominator of a rational number with the decimal expansion 44.123 are

(a) 2,3   (b) 2, 3, 5   (c) 2, 5   (d) 3, 5

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Question 8 Prime factors of the denominator of a rational number with the decimal expansion 44.123 are (a) 2,3 (b) 2, 3, 5 (c) 2, 5 (d) 3, 5 Now, 44.123 = 44123/1000 Now, Prime factors of denominator = Prime factors of 1000 = 103 = (2 × 5)3 ∴ Prime factors are 2, 5 So, the correct answer is (c)

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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.