Find the $HCF$ of the following pairs of numbers:

$Q.1.$ $30$ and $72$

$Q.2.$ $19$ and $23$

Options:
$A. 6, 1$
$B. 1, 6$
$C. 5, 1$
$D. 1, 5$

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

If $\alpha, \beta$,and $\gamma$ are the zeros of the cubic polynomial $p(x) = ax^3 + bx^2 + cx + d$ where $a \neq 0$,then the product of its zeros $(\alpha \beta \gamma)$ is:

The $HCF$ of $13$,$23$,and $31$ is . . . . . . .

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

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