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Which number is divisible by 9?

A. 209
B. 198
C. 181

Answer :

To determine which number is divisible by 9, you can use a simple rule: a number is divisible by 9 if the sum of its digits is also divisible by 9. Let's check each number:

1. 209:
- Add the digits together: 2 + 0 + 9 = 11.
- Check if 11 is divisible by 9. It is not.

2. 198:
- Add the digits together: 1 + 9 + 8 = 18.
- Check if 18 is divisible by 9. Yes, it is, because 18 ÷ 9 = 2.

3. 181:
- Add the digits together: 1 + 8 + 1 = 10.
- Check if 10 is divisible by 9. It is not.

From this analysis, the number 198 is the one divisible by 9.

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