| Countries of the World Quiz | 47,378,239 | 0 | - |
| Europe Capitals Quiz | 1,584,145 | 0 | - |
| European Capitals by Map | 138,826 | 0 | - |
| Asia Capitals Quiz | 691,763 | 0 | - |
| Asian Capitals - Map Quiz | 61,212 | 0 | - |
| Asian Capitals by Map | 62,180 | 0 | - |
| US States Quiz | 16,849,703 | 0 | - |
| All 88 constellations by picture | 839 | - | - |
| U.S. Presidents Quiz | 3,692,185 | 0 | - |
| Prime Ministers of the UK | 438,304 | 0 | - |
| Africa Capitals Quiz | 736,613 | 0 | - |
| African Capitals by Map | 133,545 | 0 | - |
| South American Capitals - Map Quiz | 130,315 | 0 | - |
| North American Capitals - Map Quiz | 57,805 | 0 | - |
| African Capitals - Map Quiz | 62,357 | 0 | - |
| Click the Asian Capitals on a Map | 41,612 | 0 | - |
| North America Capitals Quiz | 219,375 | 0 | - |
| North American Capitals by Map | 8,756 | - | - |
| South America Map Quiz | 1,548,453 | 0 | - |
| South American Capitals by Map | 16,148 | - | - |
| South America Capitals Quiz | 480,776 | 0 | - |
| U.S. State Capitals Quiz | 1,687,772 | 0 | - |
| Official Cities in the UK | 283,307 | 0 | - |
| Name the English Monarchs | 501,971 | 0 | - |
| Counties of England | 795,551 | 0 | - |
| Largest Objects in the Solar System | 137,058 | 0 | - |
| Elements of the Periodic Table | 2,239,554 | 0 | - |
| International Scientific Units | 156,649 | 0 | - |
| Major Taxonomic Ranks | 80,464 | 0 | - |
| Letters of the Greek Alphabet | 646,643 | 0 | - |
| Ye Olde Professions | 156,647 | 0 | - |
| World Capitals Quiz | 5,067,281 | 0 | - |
| African Great Lakes | 66,116 | 0 | - |
| 5 Oceans Map Quiz | 3,435 | - | - |
| Oceanian Capitals - Map Quiz | 50,571 | 0 | - |
| Oceanian Capitals by Map | 15,130 | - | - |
| Oceania Capitals | 23,040 | - | - |
| All Country Flags of the World | 3,654,989 | 0 | - |
| Brightest star of each constellation | 56 | - | - |
