11.

The sum of all possible values of a, for which the 4-digit number 547a is divisible by 3, is

• 7

• 15

• 10

• 13

The value of a should be decided in such a way that the sum of the digits is divided by 3 completely.

:. 547 a = 5 + 4 + 7 + a = Number divisible by 3 = 16 + a [It should be divided by 3 completely]

⇒ a = 2, 5, 8 = 2 + 5 + 8 [Sum of values of a]

= 15