CBSE Class 10 Sample Paper for 2022 Boards - Maths Standard [MCQ]

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Question 25 - CBSE Class 10 Sample Paper for 2022 Boards - Maths Standard [MCQ] - Solutions of Sample Papers for Class 10 Boards

Last updated at Dec. 16, 2024 by

The LCM of two prime numbers p and q (p > q) is 221. Find the value of 3p – q.

(a) 4   (b) 28   (c) 38   (d) 48

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Question 25 The LCM of two prime numbers p and q (p > q) is 221. Find the value of 3p – q. (a) 4 (b) 28 (c) 38 (d) 48Given that p and q are prime numbers Therefore, HCF of p and q = 1 Now, we know that Product of two numbers = HCF × LCM p × q = 221 p × q = 13 × 17 And since p > q ∴ q = 13, p = 17 Now, 3p − q = 3(17) − 13 = 51 − 13 = 38 So, the correct answer is (c)

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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 and Computer Science at Teachoo