How to roll 100:
- take 10 sided die, roll once
- take that number and multiply by 10
- roll 10 sided die again
- add that to the number from #2
- add 1 (otherwise it would be 0-99, not 1-100)
How to roll 100:
that’s exactly what I said, also you’d still need to add 1 to make rolling 100 possible