What is the least common multiple of $10$ and $20$ ?

2

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5

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10

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20

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200

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Solution

The correct option is C $20$
$10 = 2 \times 5$

$20 = 2 \times 2 \times 5$

Thus,

$L C M = 2 \times 2 \times 5 = 20$

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