You’re asking about rolling dice versus counting dice. While it’s not very obvious with a six sided dice, a 20- sided die is usually put together the same way, so that opposing sides sum to the same number, and adjacent sides are farther apart. Some such die have numbers next to each other so it’s easy to turn the top face from 20 to 19 to 18, etc. With some practice, you could roll the counting die to give your preferred high or low result.
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