Question

Mark (✓) against the correct answer
If 6x5 is exactly divisible by 9, then the least value of x is
(a) 1
(b) 4
(c) 7
(d) 0

Answer 1

(c) 7

When a number is divisible by 9, the sum of the digits is also divisible by 9.

$6+x+5=11+x$

To be divisible by 9:
$11+x=18\Rightarrow x=7$