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Mathematics 15 Online
OpenStudy (anonymous):

Medals Given Which of the following helps you to determine that two hundred seventy-nine is divisible by 9? seventy-nine is divisible by 9. 2 plus 7 plus 9 is divisible by 9. The last digit is a 9. 9 is divisible by 9.

OpenStudy (anonymous):

Add all the digits and see if it's divisible by 9! 2+7+9=18, 18 is divisible by 9! "2 plus 7 plus 9 is divisible by 9" is your answer.

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