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

If $k_{1}$ and $k_{2}$ are two distinct prime integers,then their $\text{l.c.m.}$ is ..........

Find the $\text{g.c.d.}$ of $867$ and $255$ using Euclid's division algorithm.

Using Euclid's division algorithm,determine whether the pair of numbers $231$ and $396$ are co-prime.

An army contingent of $616$ members is to march behind an army band of $32$ members in a parade. The two groups are to march in the same number of columns. What is the maximum number of columns in which they can march?

The difference between the $HCF$ and $LCM$ of two prime numbers $7$ and $11$ is . . . . . . .