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Mathematics 10 Online
OpenStudy (anonymous):

Which of the following sequences is not arithmetic? 3, 5, 7, 9, ... 7, 21, 63, 189, ... 4, 8, 12, 16, ... 9, 12, 15, 18, ...

OpenStudy (marissalovescats):

I believe the 2nd one. Because it deals with multiplication

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