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.