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

Algebra.Com
Question 805346: What is number is next in the sequence?.....3,-6,12,4,20,?
Answer by AnlytcPhil(1806)   (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
RELATED QUESTIONS

What is the next number in the sequence? 3, -6, 12, 4, 20,... (answered by checkley77)
What is the next number in the sequence 3, -6, 12, 4, 20? (answered by Alan3354,ikleyn)
3, -6, 12, 4, 20, ? what is the next number in... (answered by ikleyn)
What is The next number in the sequence 3, 2, 6, 4, 9, 6, 12,... (answered by MathIsHard_Yay)
What’s next in sequence: 3, -6, 12, 4,... (answered by ikleyn)
what is the next number in the sequence? 8, -20, 6... (answered by Edwin Parker)
What is the next number in this sequence??? 189 21 12 6... (answered by fractalier)
What is the next number in the sequence: 3 9 4 5 25 20 21 441... (answered by Edwin McCravy)
What is the next number in the sequence...3, -6,12, 4, 20 (answered by greenestamps)
What is the next number in the sequence: 2 3 4 3 6... (answered by Edwin McCravy)