Question

In each of the following numbers, replace * by a digit to make the number divisible by $9$:

$*8768$

Answer 1

A number is divisible by $9$, if the sum of its digits is divisible by $9$.

Let the required digit be $x$

Sum of digits be $x+8+7+6+8=x+29$

$x$ should be $7$. So, that $29+x=7+29=36$ is divisible by $9$

Hence, the number becomes $78768$