The LCM of 36 and 45 is ___.

220

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105

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180

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108

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Solution

The correct option is C 180
$\begin{matrix} 3 & 36, 45 3 & 12, 15 2 & 4, 5 2 & 2, 5 5 & 1, 5 1, 1 \end{matrix}$
LCM = 3 × 3 × 2 × 2 × 5
= 180

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