Question

The LCM of 36 and 45 is ___.

• A. 220
• B. 105
• C. 180
• D. 108

Answer 1

The correct option is C 180

$\begin{array}{cc}3& 36,45\\ 3& 12,15\\ 2& 4,5\\ 2& 2,5\\ 5& 1,5\\ & 1,1\end{array}$
LCM = 3 × 3 × 2 × 2 × 5
= 180