Question

If $486\ast 7$ is divisible by $9,$ then the least value of $\ast$ is
(a) $0$
(b) $1$
(c) $3$
(d) $2$

Answer 1

The correct option is (d) $2$
For a number to be divisible by $9,$ the sum of its digits must be divisible by $9.$
$4+8+6+\ast +7=25+\ast$

The next number which is divisible by $9$ is $27.$
Now, $25+\ast =27$

$\ast =27-25=2$