Question : If a nine-digit number 785$x$3678$y$ is divisible by 72, then the value of ($x$ + $y$) is:

Option 1: 20

Option 2: 12

Option 3: 10

Option 4: 5

Question : If the 9-digit number $72 x 8431y 4$ is divisible by 36, what is the value of $(\frac{x}{y}-\frac{y}{x})$ for the smallest possible value of $y$, given that $x$ and $y$ are natural numbers?

Option 1: $1 \frac{5}{7}$

Option 2: $2 \frac{1}{10}$

Option 3: $1 \frac{2}{5}$

Option 4: $2 \frac{9}{10}$

Question : If the number 8764x5 is divisible by 9, then find the least possible value of x where x is a two-digit number.

Option 1: 15

Option 2: 06

Option 3: 14

Option 4: 18

Question : If 86y5 is exactly divisible by 3, then the least value of y is:

Option 1: 3

Option 2: 0

Option 3: 1

Option 4: 2

Question : If a nine-digit number 785$x$3678y is divisible by 72, then the value of ($x$ – $y$) is:

Option 1: –2

Option 2: 0

Option 3: 2

Option 4: –1