The largest three-digit number divisible by 3 is 999.
Here's why:
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Largest Three-Digit Number: The largest three-digit number is 999.
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Divisibility Rule of 3: A number is divisible by 3 if the sum of its digits is divisible by 3.
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Applying the Rule: The sum of the digits of 999 is 9 + 9 + 9 = 27.
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Divisibility Check: 27 is divisible by 3 (27 / 3 = 9).
Therefore, since 999 is the largest three-digit number and it is divisible by 3, it is the answer.