Question

Mark (✓) against the correct answer
If x48y is exactly divisible by 9, then the least value of (x + y) is
(a) 4
(b) 0
(c) 6
(d) 7

Answer 1

(c) 6

When a number is divisible by 9, the sum of its digits is also divisible by 9.
$x+4+8+y=12+(x+y)$

For $12+(x+y)$ to be divisible by 9:
$12+(x+y)=18\Rightarrow (x+y)=6$