The Least Common Multiple $(LCM)$ of $7$,$11$,and $17$ is . . . . . . .

Any odd positive integer $a$ is of the form . . . . . . ,where $m$ is an integer.

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

For two positive integers $a$ and $b$,if $\text{HCF}(a, b) = 7$ and $\text{LCM}(a, b) = 385$,then find the product $a \times b$.

If $HCF(a, b) = 8$,$LCM(a, b) = 64$ and $a > b$,then $a = ?$ (Options: $8, 16, 32, 64$)

The $HCF$ of $6$ and $20$ is .......