@Hiryuu,
For those of you that don't know much Excel, I would suggest you learn by doing Lenny Conundrums in Excel. I've created a repository of functions that Neopets has repeatedly used, so every time I start a new LC, things like base conversions are already loaded for me, and I just plug in formulas to solve the Lenny Conundrums. But then, my time of doing LCs goes back to double digit rounds...
- PeckyP