Grendonian, are you referring to any of my replies?
If so in first answer the number of letters missing between each character increases by one each time.
second answer is simply consecutive numbers cubed, e.g.5x5x5 =125.
I think the other answers have been explained.
Cheers
sorry grendonian & sarumite: I seem to have inserted vast expanses of white inadvertantly, which meant I couldn't see my own answers and consequently posted them twice !