Grade 1210 grade maths
Find the LCM and HCF of the following integers by applying the prime factorisation method. 12, 15 and 21
Find the LCM and HCF of the following integers by applying the prime factorisation method.
12, 15 and 21
1 Answer
Harshit Singh
Dear Student
12, 15 and 21
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
12, 15 and 21
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
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