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Mathematics 12 Online
OpenStudy (anonymous):

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

OpenStudy (triciaal):

*-2, *-2, /3, *5 what is the question?

OpenStudy (aum):

3, -6, 12, 4, 20, ? -9 +18 -8 +16 -7 So 13. And the number after that is 13 + 14 = 27

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