Question

12, 15 and 21 find lcm by prime factorization ​

Answer 1

Step-by-step explanation:

By Prime factorization...

12=2^2×3

15=3×5

21=3×7

The LCM (12,15,21)=420....(4×3×5×7)

Hope this will help you

Thnku

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Answer 2

Answer:

420 is the lcm of 12,15 and 21