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Here's one way to find a number that is divisible by 3:

If the digits of the number add up to 3, 6, or 9, then it is divisible by 3.

For example, 321 is divisible by 3 because 3+2+1=6. (If the sum of the digits isn't one digit, just add those digits as well until you get to one digit (for example, 999--> 9+9+9=27, 2+7=9))

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14y ago

What else can I help you with?