The Least Common Multiple $(LCM)$ of the smallest prime number and the smallest composite number is . . . . . . .

The decimal form of $\frac{6}{15}$ is ............

For any two positive integers $a$ and $b$,what is the relationship between their $HCF$ and $LCM$? $\text{HCF}(a, b) \times \text{LCM}(a, b) = \text{?}$

Find the $HCF$ and $LCM$ of the integers $336$ and $54$ and verify that $HCF \times LCM = \text{product of the two integers}$.

The $HCF$ of two numbers is $9$ and their product is $288$. Find their $LCM$.

Find the $LCM$ and $HCF$ of the following pairs of integers and verify that $LCM \times HCF =$ product of the two numbers $26$ and $91$.