If a number is divisible by 9, then it is also divisible by which numb...
Divisibility Rule for 9:
When a number is divisible by 9, the sum of its digits is also divisible by 9.
Explanation:
Let's take an example of a number 567.
Sum of digits of the number = 5+6+7 = 18
Since 18 is divisible by 9, the number 567 is also divisible by 9.
Divisibility Rule for 3:
When a number is divisible by 3, the sum of its digits is also divisible by 3.
Explanation:
Let's take the same example of the number 567.
Sum of digits of the number = 5+6+7 = 18
Since 18 is divisible by 3, the number 567 is also divisible by 3.
Therefore, if a number is divisible by 9, it will also be divisible by 3 since both have the same divisibility rule.
Conclusion:
If a number is divisible by 9, then it is also divisible by 3.
Therefore, the correct answer is option 'A' which is 3.