Demo math addition to the document

1. What is the LCM of 12 and 18?

$$\text{(A) 36} \quad \text{(B) 72} \quad \text{(C) 24} \quad \text{(D) 6}$$$$

$$\text{LCM}(12, 18) = \frac{12 \times 18}{\text{HCF}(12, 18)} = \frac{216}{6} = 36$$

$$\boxed{\text{Answer: (A) 36}}$$