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प्रश्न
Test the divisibility of the following numbers by 9:
3333
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उत्तर
A number is divisible by 9 if the sum of its digits is divisible by 9.
3333 is not divisible by 9, because the sum of its digits, 3 + 3 + 3 + 3, is 12, which is not divisible by 9.
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