Only got a d20? No problem

When I'm out and about, I don't always have a full set of dice because I carry a small bag. This is sometimes of critical importance when an impromptu game of D&D breaks out. In 5e, you usually only need a d20, but there are cases you need a d4, d6, d8, d10, d12, or even a d100. Fortunately, you can easily use a d20 and some mental arithmetic to simulate all of these dice with the humble d20. You…