Tabla del 21
| 21 | X | 1 | = | 21 |
| 21 | X | 2 | = | 42 |
| 21 | X | 3 | = | 63 |
| 21 | X | 4 | = | 84 |
| 21 | X | 5 | = | 105 |
| 21 | X | 6 | = | 126 |
| 21 | X | 7 | = | 147 |
| 21 | X | 8 | = | 168 |
| 21 | X | 9 | = | 189 |
| 21 | X | 10 | = | 210 |
| 21 | X | 1 | = | 21 |
| 21 | X | 2 | = | 42 |
| 21 | X | 3 | = | 63 |
| 21 | X | 4 | = | 84 |
| 21 | X | 5 | = | 105 |
| 21 | X | 6 | = | 126 |
| 21 | X | 7 | = | 147 |
| 21 | X | 8 | = | 168 |
| 21 | X | 9 | = | 189 |
| 21 | X | 10 | = | 210 |