Question

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

Answer 1

solution:

Possible value of a= 2,5,8 (by using divided by 3)

So, number are = 5472, 5475, 5478

Answer 2

Answer:

Sum of all possible values for a is 15

Step-by-step explanation:

For a number to be divisible by 3 , the sum of all digits of the number should be a multiple of 3.

The number given is 547a

The sum of digits of this number :

5 + 4 + 7 + a = 16 + a

Thus for this number to be divisible by 3 the possible values of ' a ' can be

2, 5, 8 as

(16 + 2 = 18 which is a multiple of 3 ,

Similarly,

16 + 5 = 21 is a multiple of 3 and

16 + 8 = 24 is also a multiple of 3 )

Thus sum of the values of a ,

2+5+8 = 15