Prime factors of 27 and 21: 27=3×3×3 21=3×7 Hence, LCM of 27 and 21 is 3×3×3×7=189. ...

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Least Common Multiple (LCM)

LCM of 27 and...

Question

LCM of $27$ and $21$ is

189

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63

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21

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195

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Solution

The correct option is A $189$

Prime factors of $27$ and $21 :$
$27 = 3 \times 3 \times 3$
$21 = 3 \times 7$
Hence, LCM of $27$ and $21$ is
$3 \times 3 \times 3 \times 7 = 189.$

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