| Countries of the World Quiz | 47,379,774 | 0 | - |
| Europe Capitals Quiz | 1,584,202 | 0 | - |
| European Capitals by Map | 138,833 | 0 | - |
| Asia Capitals Quiz | 691,780 | 0 | - |
| Asian Capitals - Map Quiz | 61,213 | 0 | - |
| Asian Capitals by Map | 62,183 | 0 | - |
| US States Quiz | 16,850,251 | 0 | - |
| All 88 constellations by picture | 839 | - | - |
| U.S. Presidents Quiz | 3,692,255 | 0 | - |
| Prime Ministers of the UK | 438,324 | 0 | - |
| Africa Capitals Quiz | 736,651 | 0 | - |
| African Capitals by Map | 133,548 | 0 | - |
| South American Capitals - Map Quiz | 130,319 | 0 | - |
| North American Capitals - Map Quiz | 57,806 | 0 | - |
| African Capitals - Map Quiz | 62,359 | 0 | - |
| Click the Asian Capitals on a Map | 41,613 | 0 | - |
| North America Capitals Quiz | 219,384 | 0 | - |
| North American Capitals by Map | 8,756 | - | - |
| South America Map Quiz | 1,548,479 | 0 | - |
| South American Capitals by Map | 16,150 | - | - |
| South America Capitals Quiz | 480,811 | 0 | - |
| U.S. State Capitals Quiz | 1,687,796 | 0 | - |
| Official Cities in the UK | 283,322 | 0 | - |
| Name the English Monarchs | 502,002 | 0 | - |
| Counties of England | 795,641 | 0 | - |
| Largest Objects in the Solar System | 137,064 | 0 | - |
| Elements of the Periodic Table | 2,239,623 | 0 | - |
| International Scientific Units | 156,657 | 0 | - |
| Major Taxonomic Ranks | 80,466 | 0 | - |
| Letters of the Greek Alphabet | 646,666 | 0 | - |
| Ye Olde Professions | 156,649 | 0 | - |
| World Capitals Quiz | 5,067,432 | 0 | - |
| African Great Lakes | 66,118 | 0 | - |
| 5 Oceans Map Quiz | 3,435 | - | - |
| Oceanian Capitals - Map Quiz | 50,573 | 0 | - |
| Oceanian Capitals by Map | 15,130 | - | - |
| Oceania Capitals | 23,040 | - | - |
| All Country Flags of the World | 3,655,228 | 0 | - |
| Brightest star of each constellation | 56 | - | - |
