SOLUTION: next number in the following sets of series 3,-6,12,4,20,? 7,16,8,27,9,? 2,7,26,101,400,? 7,21,8,72,9?

Question 1141237: next number in the following sets of series
3,-6,12,4,20,?
7,16,8,27,9,?
2,7,26,101,400,?
7,21,8,72,9?
Found 2 solutions by greenestamps, Alan3354:
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

We see this kind of question all the time; but in fact these are not valid mathematical questions.

Without any information about what kinds of sequences these are, it is impossible to know the right answers. Given any sequence of numbers, you can put any number you want next and it will be a valid sequence. Stated differently, any number you put next will be as good an answer as any purported "correct" number.

Spend a small amount of time, if you want, looking for a logical pattern in each of the sequences. But realize that any answer you come up with might not be "right".
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Any number can be the next number, and be justified.
Pointless.
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