Singapore Math – Challenge Workbook for 5th, 6th, 7th, 8th Grade Math, Paperback, Ages 10–14 with Answer Key (Volume 21)
| Country | USA |
| Manufacturer | Vintage |
| Binding | Paperback |
| ItemPartNumber | 40334163 |
| Color | Red |
| ReleaseDate | 2021-06-29 |
| UnitCount | 1 |
| EANs | 9780593081259 |