Question

If a four digit number 258 x is divisible by 3, then find the value of (g) of x ?​

Answer 1

We know a number is divisible by 3 is sum of its digit divisible by 3.
So
2 + 5 + 8 + x = multiple of 3
11 + x = 12 or 15 or 18
So, x = 1, 4, 7

Answer 2

Answer:

3, 6 or 9

Step-by-step explanation:

Divisibility test of 3 ---> If sum of digits of a number is divisible by 3, then the whole number is divisible by 3.

Now, 258x is divisible by 3,

=> 2 + 5 + 8 + x is divisible by 3

=> 15 + x is divisible by 3.

∴ x can be 3, 6 or 9 (x can only be a single digit, otherwise it wonn't make 258x a 4 digit no.).