Talen 2521 till 2527 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2521 | = | MMDXXI | = | 1000 + 1000 + 500 + 10 + 10 + 1 |
| 2522 | = | MMDXXII | = | 1000 + 1000 + 500 + 10 + 10 + 1 + 1 |
| 2523 | = | MMDXXIII | = | 1000 + 1000 + 500 + 10 + 10 + 1 + 1 + 1 |
| 2524 | = | MMDXXIV | = | 1000 + 1000 + 500 + 10 + 10 + 5 − 1 |
| 2525 | = | MMDXXV | = | 1000 + 1000 + 500 + 10 + 10 + 5 |
| 2526 | = | MMDXXVI | = | 1000 + 1000 + 500 + 10 + 10 + 5 + 1 |
| 2527 | = | MMDXXVII | = | 1000 + 1000 + 500 + 10 + 10 + 5 + 1 + 1 |