On Jan 6, 2006, at 5:04 PM, Sascha Abel wrote:

> < One gaming system developed by Gary Gygax after he was ousted
>> from TSR in the mid-80s used what he termed d10x, which was d10*d10,
>> resulting in values from 1 - 100 with a radically different  
>> probability
>> curve than a normal d100.
>
> Not only a different curve, but also some values would be  
> impossible to
> get (as 13 and 51)

Na, if you get a 1 on the tens die and a 3 on the ones die, you have  
rolled a 13.

James Edward Gray II