SOLUTION: 3, -6, 12, 4, 20, ?

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Question 1146150: 3, -6, 12, 4, 20, ?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
It goes minus 9 plus 18 then minus 8 then plus 16 so then it should be minus 7 and plus 14
So the series is 3,-6,12,4,20,13,27