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

Question 1120724: 3, -6, 12, 4, 20,
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

The answer to every question like this is the same:

It is impossible to know what the "right" answer is; any next number(s) will form a valid sequence.
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