Question

7. Find HCF and LCM of 12, 15 and 21 by prime
factorisation method.
(2)
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Answer 1

Answer:

12..

is the AnSwer

Step-by-step explanation:

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Answer 2

Answer:

1. 12=2×2×3
2. 15=3×5
3. 21=7×3

LCM=420

hcf=3