Question

Tick (✓) the correct answer
If 1A2B5 is exactly divisible by 9, then the least value of (A + B) is
(a) 0
(b) 1
(c) 2
(d) 10

Answer 1

(b) 1

For a number to be divisible by 9, the sum of the digits must also be divisible by 9.

$1+A+2+B+5=(A+B)+8$

The number will be divisible by 9 if $(A+B)=1$.