That seems odd, maybe because I am used to the &quot;conventional&quot; way of rolling d100: roll two d10s, where the first die is concatenated with the second. A roll of 0 on both dies indicates 100. Some d10s are even sold with a zero tacked on, so you actually see 10, 20, 30, etc, instead of 1, 2, 3, etc... just so there is no question as to which is the &quot;tens&quot; die.