Least common multiple of $8, 12$ and $20$ is ________ .

12

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24

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120

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240

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Solution

The correct option is C $120$
$8 = 2 \times 2 \times 2$
$12 = 2 \times 2 \times 3$
$20 = 2 \times 2 \times 5$
Therefore LCM of $8, 12$ and $20$ $= 2 \times 2 \times 2 \times 3 \times 5 = 120$

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