$18 \%$ of $125 \times 9 \%$ of $25 = ? - 100$

Find the simplified value of $63 \sqrt{(729)^{-\frac{2}{3}}+(343)^{-\frac{2}{3}}} ?$

How many positive factors of $160$ are there?

$A$ number $N$ is a positive three-digit number. If $x$ is in its hundred's place and $y$ is in its unit's place,then the number $N - 100x - y$ is always divisible by

What is the smallest $6$-digit number that is completely divisible by $108$?

The difference between a two-digit number and the number obtained by interchanging the digits is $36$. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is $1:2$?