Question

If 21 x15 is divisible by 3 what can be the value of x​

Answer 1

Answer:

Hello

sorry but i dont know what is the answer of the question

Answer 2

Answer:

x can be 0,3,6,9

Step-by-step explanation:

a number is divisible by 3 if some of digits is divisible by 3

⇒ 2+1+x+1+5 = x + 9

⇒ x+9 should be divisible by 3

3 multiples were 9, 12, 15,18

1. x+9 = 9 ⇒ x = 0
2. x+9 = 12 ⇒ x = 3
3. x+9 = 15 ⇒ x = 6
4. x+9 = 18 ⇒ x = 9

so, x can be 0,3,6,9