Talen 1525 till 1531 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1525 | = | MDXXV | = | 1000 + 500 + 10 + 10 + 5 |
| 1526 | = | MDXXVI | = | 1000 + 500 + 10 + 10 + 5 + 1 |
| 1527 | = | MDXXVII | = | 1000 + 500 + 10 + 10 + 5 + 1 + 1 |
| 1528 | = | MDXXVIII | = | 1000 + 500 + 10 + 10 + 5 + 1 + 1 + 1 |
| 1529 | = | MDXXIX | = | 1000 + 500 + 10 + 10 + 10 − 1 |
| 1530 | = | MDXXX | = | 1000 + 500 + 10 + 10 + 10 |
| 1531 | = | MDXXXI | = | 1000 + 500 + 10 + 10 + 10 + 1 |