In the following number, replace $*$ by smallest digit and largest digit to make the number divisible by $3$.

$3*215$

If $P713$ is divisible by $11$, find the value of the smallest natural number $P$?

How many numbers are there from $14$ to $159$ which are divisible by both $2$ and $8$?

Consider the following statements: For any integer $n,$ 

I.. $n^2+3$ is never divisible by $17$ .

II.. $n^2+4$ is never divisible by $17$. Then