The $HCF$ 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 which of the following is true?

The decimal representation of $\frac{1}{32}$ is:

The decimal expansion of $\frac{18}{5^{3}}$ will terminate after how many decimal places?

The last digit of $2^m \cdot 5^n$ $(m, n \in \mathbb{N})$ is . . . . . . .

If a positive integer is of the form $3q + 1$,where $q$ is a natural number,then its square can be written in the form $3m + 1$. Is the statement true or false?