Singapore Math – Challenge Workbook for 5th, 6th, 7th, 8th Grade Math, Paperback, Ages 10–14 with Answer Key (Volume 21)
| Country | USA |
| Brand | BGGJJ |
| Manufacturer | BGGJJ |
| ItemPartNumber | BGGJJ160 |
| Model | BGGJJ160 |
| Color | Set |
| UnitCount | 1 |
| EANs | 4015398472106 |
| ReleaseDate | 0000-00-00 |