Are any of you in university in the states? If so, keep an eye out to see if Microsoft hosts an puzzle competitions there. They've had one here at umich for the past 2 years. Lots of fun and prizes too and people on here would probably do pretty well.
Hm... well, before I start wandering off on tangents, let's get the basics out of the way: It's a 3 digit number, with E1, EF, EI being the three digits, right?
169 seems too easy but I'll guess that for starters anyway.
Well, Nicky handily beat notpron a lot faster than I. So I'm gonna assume that IQ is higher than mine. Although I can't decode it yet, maybe I've eliminated some possibilities...
Oh, duh, I tried the first but only did it the first way around (ignored the vice versa)
I don't know what 6-sided means... I'm trying something, regardless
edit: nevermind, I think I know what you mean by 6-sided, and I think that was what I had in mind.