Task
What Roman number corresponds to the number 78?
Solution
| \(\displaystyle tens\) | \(\displaystyle ones\) | |||
| \(\displaystyle 70\) | \(\displaystyle +\) | \(\displaystyle 8\) | \(\displaystyle =\) | \(\displaystyle 78\) |
| \(\displaystyle {\rm LXX}\) | \(\displaystyle +\) | \(\displaystyle {\rm VIII}\) | \(\displaystyle =\) | \(\displaystyle {\rm LXXVIII}\) |
Answer: \(\displaystyle {\rm LXXVIII .}\)