Question

find the HCF and LCM of 15,12and21 using prime factorisation with solution​

Answer 1

Answer:

hcf is 3 and lcm is 420

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Answer 2

Answer:

•12=2×2×3.

•12=2×2×3.•15=5×3.

•12=2×2×3.•15=5×3.•21=7×3.

•12=2×2×3.•15=5×3.•21=7×3.•HCF=3.

•12=2×2×3.•15=5×3.•21=7×3.•HCF=3.•LCM=2²×3×5×7=420.

Step-by-step explanation:

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