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Question
Test the divisibility of the following numbers by 9:
326999
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Solution
A number is divisible by 9 if the sum of its digits is divisible by 9.
326999 is not divisible by 9, because the sum of its digits, 3 + 2 + 6 + 9 + 9 + 9, is 38, which is not divisible by 9.
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