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LCM of 3 Numbers

The least com...

Question

The least common multiple of 9, 18, 57 and 12 is _____.

A

114

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B

36

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C

684

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D

228

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Solution

The correct option is C 684
$\begin{matrix} 3 & 9, 18, 57, 12 3 & 3, 6, 19, 4 2 & 1, 2, 19, 4 2 & 1, 1, 19, 2 19 & 1, 1, 19, 1 1, 1, 1, 1 \end{matrix} LCM = 3 \times 3 \times 2 \times 2 \times 19 = 684$

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