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A d% generates numbers from 1 to 100. You can simulate this with two 10-sided die of different colors. Let the result of the darker-colored dice be X, which is between 0 and 9, this time the ``0'' on the dice is a 0 in the result, and the result of the lighter die be Y (from 0 to 9). The result ris

\begin{displaymath}r:=10\cdot (X)+Y.\end{displaymath}

A result r of 0 is treated as 100.

A players rolls with a black and a white 10-sided dice. The black dice shows a 5 and the white dice shows a 0, so the result for the white die is a 0. The result r of the d% is \( r=10\cdot (5)+0=40+10=50 \). If both dice show a ``0'', the result would be \( r=10\cdot (0)+0=0\Rightarrow r=100. \)
Veteran players also know other ways to determine a d%.

Michael Sachau