If you have seen this one before, please refrain from posting the solution too soon. Please give the others some time before posting the answer.
Okay, I have three numbers that I am listing as a series: 2, 4, and 8. What I want you to do is give me three more numbers that fit the pattern. You have to give me the rule you used in finding these extra numbers. If your three numbers fit the pattern I am using you've won! If not I'll let you know.
If the sequence is an and then the rule I choose to apply is
There is nothing to infer from the first 3 numbers as we can only speculate, the next numbers in the sequence according to the rule I speculated are -1, 2.5, pi
The two of you have correct numbers, but that is not my rule.
I'd drag this out further because I'm evil, but there seems to be little point.
Solution: My pattern is three numbers in numerical sequence. ie. 2, 4, 6 and 6, 7, 1000000 hold with the pattern whereas 10, pi, 1 do not.
The whole point of this is that people, even in the Math or Science community, have a tendency to not deal with other options if they think they see a pattern. (I guess it works better in person than it does on the forum.)