| 21. | 2, 2, 5, 13, 28, ? |
|---|---|
|
| 22. | 11, 13, 17, 19, 23, 25, ? |
|---|---|
|
| 23. | 66, 36, 18, ? |
|---|---|
|
| 24. | 5, 2, 7, 9, 16, 25, ? |
|---|---|
|
| 25. | 563, 647, 479, 815, ? |
|---|---|
|
