Ten-sided dice are often used in games that require a "percentage roll", such as Dungeons & Dragons. Players roll two 10-sided dice, and the numbers rolled are used as digits to form a number between 0 and 99. Using a "0" instead of "10" simplifies this process.
For most other games and instances, zeroes on ten-sided dice represent tens.
Just FYI - some ten-sided dice do actually have a "10" instead of a "0", but they're fairly rare. I got 4 of them in a board game called Filthy Rich, which - ironically enough - uses numerous references to rolling zeroes instead of tens. Go figure.
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If the dice is 6 sided, the chances of rolling each number is about 17% (100/6) If the dice is 4 sided, the chances of rolling each number is 25% (100/4) Similarly, 8 sided = 12.5% 10 sided = 10% 12 sided ≈ 8% 20 sided = 5%
There are 104, or 10000 permutations of four 10 sided dice.
-4
2 6-sided? 0% 2 10-sided? 7% 2 20-sided? 3.25%
If there is a different number on each face of the die and no numbers a repeated it is a 1 in 10 chance.