Question

16. Find HCF and LCM of 12, 15 and 21 use the prime factorization method.
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Answer 1

Answer:

420

Step-by-step explanation:

12 = 2 × 2 × 3 = 2sq × 3 15 = 3 × 5 21 = 3 × 7 HCF = product of smallest power of each common prime factor in the numbers = 3 LCM = product of greatest power of each prime factor involved in the numbers = 2sq × 3 × 5 × 7 = 420

Answer 2

Answer:

HCF = 3

LCM = 420

hope it helps :)