Curated
10| # | Title | Difficulty | Tags | |
|---|---|---|---|---|
| 227 | Units modulo fifteen | Easy | ||
| 228 | An inverse mod 26 | Easy | ||
| 554 | The first failure | Easy | ||
| 558 | Ideals of ℤ₆ | Easy | ||
| 559 | Remainder in ℚ[x] | Easy | ||
| 229 | Units of the Gaussian integers | Medium | ||
| 553 | Zero divisors in ℤ₁₂ | Medium | ||
| 555 | Characteristic of a product ring | Medium | ||
| 556 | Idempotents | Medium | ||
| 557 | Nilpotent elements | Medium |