Talen 2915 till 2921 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2915 | = | MMCMXV | = | 1000 + 1000 + 1000 − 100 + 10 + 5 |
| 2916 | = | MMCMXVI | = | 1000 + 1000 + 1000 − 100 + 10 + 5 + 1 |
| 2917 | = | MMCMXVII | = | 1000 + 1000 + 1000 − 100 + 10 + 5 + 1 + 1 |
| 2918 | = | MMCMXVIII | = | 1000 + 1000 + 1000 − 100 + 10 + 5 + 1 + 1 + 1 |
| 2919 | = | MMCMXIX | = | 1000 + 1000 + 1000 − 100 + 10 + 10 − 1 |
| 2920 | = | MMCMXX | = | 1000 + 1000 + 1000 − 100 + 10 + 10 |
| 2921 | = | MMCMXXI | = | 1000 + 1000 + 1000 − 100 + 10 + 10 + 1 |