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Grade: 12

                        

Find the LCM and HCF of the following integers by applying the prime factorisation method. 12, 15 and 21

one month ago

Answers : (1)

Anand Kumar Pandey
askIITians Faculty
1372 Points
							Dear Student

Writing the product of prime factors for all the three numbers,
we get,

12=2×2×3
15=5×3
21=7×3

Therefore,
HCF(12,15,21) = 3
LCM(12,15,21) = 2× 2 × 3 × 5 ×7 = 420

Thanks
one month ago
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