Chapter 1, Real Numbers,
NCERT Solutions for Class 10 Maths Chapter 1
Important NCERT Questions
Real Numbers
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 1.2
Page No:11
Questions No:3 Part-1
Find the LCM and HCF of the following integers by applying the prime factorization method. 12, 15 and 21
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12, 15 and 21
12 = 2 × 2 × 3 = 2² × 3
15 = 3 × 5
21 = 3 × 7
HCF = 3
LCM = 2² × 3 × 5 × 7 = 420
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