Find the HCF and LCM of 12, 15,17,21.
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Step-by-step explanation:
L.C.M of 12, 15 and 21 = 420
Answered by
2
Answer:
LCM = 7140
HCF = 3
Step-by-step explanation:
12 = 2 × 2 × 3 = 2^2 × 3^1
15 = 3 × 5 = 3^1 × 5^1
17 = 17 × 1 = 17^1
21 = 7 × 3 = 7^1 × 3^1
LCM = 2^2 × 3^1 × 5^1 × 7^1 × 17^1
= 4 × 3 × 5 × 7 × 17
= 60 × 119
= 7140
HCF = 3^1
= 3
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