Question

1 223 is divisible by 3 because the sum of all the digits which is 9 is divisible by 3 and 9. 3 it is also divisible by 9. since the sum of digits is divisible or of 9.

Answer 1

Step-by-step explanation:

Every number divisible by 9 is divisible by 3. For example, 7425 is divisible by 9, hence it is divisible by 3. However, a number divisible by 3 is not necessarily divisible by 9. For example 6, 12, 15, 21, 24, 30 are all divisible by 3 but none of them is divisible by 9.