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Mathematics 9 Online
OpenStudy (anonymous):

what is the next number 3,-6,12,4,20

OpenStudy (aric200):

The next number would be 13 ------------------------- Pattern:-9, 18, -8, 16, '-7', 14, -6, 12, .. 3, -6, 12, 4, 20, 13, 27, 21, 33,

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