Задание
Какому римскому числу равно число \(\displaystyle 40\)?
Решение
Определение
| \(\displaystyle 10\) | \(\displaystyle 20\) | \(\displaystyle 30\) | \(\displaystyle 40\) | \(\displaystyle 50\) | \(\displaystyle 60\) | \(\displaystyle 70\) | \(\displaystyle 80\) | \(\displaystyle 90\) | \(\displaystyle 100\) |
| \(\displaystyle {\rm X}\) | \(\displaystyle {\rm XX}\) | \(\displaystyle {\rm XXX}\) | \(\displaystyle {\rm XL}\) | \(\displaystyle {\rm L}\) | \(\displaystyle {\rm LX}\) | \(\displaystyle {\rm LXX}\) | \(\displaystyle {\rm LXXX}\) | \(\displaystyle {\rm XC}\) | \(\displaystyle {\rm C}\) |
Ответ: \(\displaystyle {\rm XL}\).