Question

Find HCF and LCM of 12 15 21

Answer 1

Answer:

HCF

12=2×2×3

15=3×5

21=3×7

LCM=2×3×2×5×7

Step-by-step explanation:

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Answer 2

Answer:

$12 = 2 \times 2 \times 3$

$15 = 3 \times 5$

$21 = 3 \times 7$

$hcf = 3$

$lcm = 2 \times 2 \times 3 \times 5 \times 7$

$= 420$