SOLUTION: What is number is next in the sequence?.....3,-6,12,4,20,?

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Question 805346: What is number is next in the sequence?.....3,-6,12,4,20,?
Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
Start with       3
Subtract 9, get -6
Add 18,     get 12
Subtract 8, get  4
Add 16,     get 20
Subtract 7, get 13
Add 14,     get 27
Subtract 6, get 21
Add 12,     get 33
Subtract 5, get 28
Add 10,     get 38
Subtract 4, get 34
Add 8,      get 42

etc., etc.


Edwin