Question
Find the $LCM$ of $160, 170$ and $90.$
✓
Answer
$LCM$ of $160, 170$ and $90$ by division method.
$\begin{array}{c|c}2&160,170,90\\ \hline 2&80,85,45\\ \hline2&40,85,45\\ \hline2&20,85,45\\ \hline2&10,85,45\\ \hline3&5,85,45\\ \hline3&5,85,15\\ \hline5&5,85,5\\ \hline17&1,17,1\\ \hline&1,1,1\end{array}$
$LCM$ of $160,170$ and $90 = 25 \times 32 \times 5 \times 17 = 24480$
$\begin{array}{c|c}2&160,170,90\\ \hline 2&80,85,45\\ \hline2&40,85,45\\ \hline2&20,85,45\\ \hline2&10,85,45\\ \hline3&5,85,45\\ \hline3&5,85,15\\ \hline5&5,85,5\\ \hline17&1,17,1\\ \hline&1,1,1\end{array}$
$LCM$ of $160,170$ and $90 = 25 \times 32 \times 5 \times 17 = 24480$
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