What kind of numbers are 11 22 33 44 55 66 77 88?

Answer 1

Oh, dude, those numbers are like consecutive double-digit numbers. You know, like 11, 22, 33... I mean, it's not rocket science, but hey, at least they're in order, right? So, yeah, they're just your run-of-the-mill double-digit pals hanging out together.

Answer 2

It's a mathematic number series whose general formula is 99 - 11n where n can take any integer value between 0 and 8, both included.