What will be the unit's digit of $N$, if it is divisible by $5$ exactly?

If $51x3$ is a multiple of $9$, then find the least value of $x$.

Find a number, whose cube is equal to the number itself but its square is not equal to the number itself.

Find the value of $A$ and $B$ in the following multiplication.

$\begin{array}{ccc}& A& B\\ \times & A& B\\ 5& 7& 6\\ & & \end{array}$

Check the divisibility of $72163458$ by $9$.

Check the divisibility of $23457891$ by $9$.

If the given number is divisible by $3$, then find the values of $x$

$23x4$

If the following digits are divisible by $3$, then find the values of $x$

$23495x$

Find the two-digit number, if the digit in the one's place is three times the digit in the ten's place and the sum of the digits is equal to $12$.